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href="/archive/issues/1980s/">1980s</a><a class="date-selector decade" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1990s/">1990s</a><a class="date-selector decade" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2000s/">2000s</a><a class="date-selector decade" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2010s/">2010s</a><a class="date-selector decade" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2020s/">2020s</a></div><div class="years" 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href="/archive/issues/1995/">1995</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1996/">1996</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1997/">1997</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1998/">1998</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1999/">1999</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2000/">2000</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2001/">2001</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2002/">2002</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2003/">2003</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2004/">2004</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2005/">2005</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2006/">2006</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2007/">2007</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2008/">2008</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2009/">2009</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2010/">2010</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2011/">2011</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2012/">2012</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2013/">2013</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2014/">2014</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2015/">2015</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2016/">2016</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2017/">2017</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2018/">2018</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2019/">2019</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2020/">2020</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2021/">2021</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2022/">2022</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2023/">2023</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2024/">2024</a></div></div></div><div class="issue__list-8JHD2"><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3D185803-92A5-4CE7-9C875C9FB5DEDFD7_source.jpg?w=600" alt="Scientific American Magazine Vol 181 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/3D185803-92A5-4CE7-9C875C9FB5DEDFD7_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3D185803-92A5-4CE7-9C875C9FB5DEDFD7_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-12-01">December 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/622AED9F-EF0B-4FBB-96FBC616D5AF4283_source.jpg?w=600" alt="Scientific American Magazine Vol 181 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/622AED9F-EF0B-4FBB-96FBC616D5AF4283_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/622AED9F-EF0B-4FBB-96FBC616D5AF4283_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-11-01">November 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DF2700D5-49D9-43DB-BADAB12545519E87_source.jpg?w=600" alt="Scientific American Magazine Vol 181 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/DF2700D5-49D9-43DB-BADAB12545519E87_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DF2700D5-49D9-43DB-BADAB12545519E87_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-10-01">October 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/33A8C305-047F-4ABC-86087519984FDD59_source.jpg?w=600" alt="Scientific American Magazine Vol 181 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/33A8C305-047F-4ABC-86087519984FDD59_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/33A8C305-047F-4ABC-86087519984FDD59_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-09-01">September 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D539F52D-E9F0-4505-8294647534B60452_source.jpg?w=600" alt="Scientific American Magazine Vol 181 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/D539F52D-E9F0-4505-8294647534B60452_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D539F52D-E9F0-4505-8294647534B60452_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-08-01">August 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F5CA799E-44EC-494D-9F7DE6C35107B2D2_source.jpg?w=600" alt="Scientific American Magazine Vol 181 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/F5CA799E-44EC-494D-9F7DE6C35107B2D2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F5CA799E-44EC-494D-9F7DE6C35107B2D2_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-07-01">July 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/FB0EB0C9-0D67-497A-A0D7925161CFCBE6_source.jpg?w=600" alt="Scientific American Magazine Vol 180 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/FB0EB0C9-0D67-497A-A0D7925161CFCBE6_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/FB0EB0C9-0D67-497A-A0D7925161CFCBE6_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-06-01">June 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/23FC1C8C-4C26-429C-8C0B7CFED87A95E2_source.jpg?w=600" alt="Scientific American Magazine Vol 180 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/23FC1C8C-4C26-429C-8C0B7CFED87A95E2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/23FC1C8C-4C26-429C-8C0B7CFED87A95E2_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-05-01">May 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B716BB6C-486E-4732-BC7B829487F3033C_source.jpg?w=600" alt="Scientific American Magazine Vol 180 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/B716BB6C-486E-4732-BC7B829487F3033C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B716BB6C-486E-4732-BC7B829487F3033C_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-04-01">April 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BD5742B0-82DF-437F-937954ACEFC119BE_source.jpg?w=600" alt="Scientific American Magazine Vol 180 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/BD5742B0-82DF-437F-937954ACEFC119BE_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BD5742B0-82DF-437F-937954ACEFC119BE_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-03-01">March 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8BC0015A-F448-48A4-A811261BCC468114_source.jpg?w=600" alt="Scientific American Magazine Vol 180 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/8BC0015A-F448-48A4-A811261BCC468114_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8BC0015A-F448-48A4-A811261BCC468114_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-02-01">February 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1949/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1DC4A869-0145-491D-8F0C449A970263D8_source.jpg?w=600" alt="Scientific American Magazine Vol 180 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/1DC4A869-0145-491D-8F0C449A970263D8_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1DC4A869-0145-491D-8F0C449A970263D8_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1949-01-01">January 1949</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/122B84F1-8C59-4DBF-8E3B0C1D41CAEDC5_source.jpg?w=600" alt="Scientific American Magazine Vol 179 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/122B84F1-8C59-4DBF-8E3B0C1D41CAEDC5_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/122B84F1-8C59-4DBF-8E3B0C1D41CAEDC5_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-12-01">December 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6106556A-1A12-4E06-B8B98B1AE1C4DD9D_source.jpg?w=600" alt="Scientific American Magazine Vol 179 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/6106556A-1A12-4E06-B8B98B1AE1C4DD9D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6106556A-1A12-4E06-B8B98B1AE1C4DD9D_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-11-01">November 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/99A6A393-24A3-457F-8D3380C46D11F5E4_source.jpg?w=600" alt="Scientific American Magazine Vol 179 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/99A6A393-24A3-457F-8D3380C46D11F5E4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/99A6A393-24A3-457F-8D3380C46D11F5E4_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-10-01">October 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B7279415-0BFC-40BD-A06387A9D9FD50C0_source.jpg?w=600" alt="Scientific American Magazine Vol 179 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/B7279415-0BFC-40BD-A06387A9D9FD50C0_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B7279415-0BFC-40BD-A06387A9D9FD50C0_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-09-01">September 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6841FD86-4779-41C6-8156A8BDB7C7AD7E_source.jpg?w=600" alt="Scientific American Magazine Vol 179 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/6841FD86-4779-41C6-8156A8BDB7C7AD7E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6841FD86-4779-41C6-8156A8BDB7C7AD7E_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-08-01">August 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/097FC693-26E7-4647-AD7D8D1DFBBF48D6_source.jpg?w=600" alt="Scientific American Magazine Vol 179 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/097FC693-26E7-4647-AD7D8D1DFBBF48D6_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/097FC693-26E7-4647-AD7D8D1DFBBF48D6_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-07-01">July 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2F5250E7-F580-408E-8D3CD7546BFC5414_source.jpg?w=600" alt="Scientific American Magazine Vol 178 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/2F5250E7-F580-408E-8D3CD7546BFC5414_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2F5250E7-F580-408E-8D3CD7546BFC5414_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-06-01">June 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9232CE36-BC18-4F66-AFFF37B10B399079_source.jpg?w=600" alt="Scientific American Magazine Vol 178 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/9232CE36-BC18-4F66-AFFF37B10B399079_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9232CE36-BC18-4F66-AFFF37B10B399079_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-05-01">May 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/7F19DE34-71F7-43B6-94EE735526D54E6A_source.jpg?w=600" alt="Scientific American Magazine Vol 178 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/7F19DE34-71F7-43B6-94EE735526D54E6A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/7F19DE34-71F7-43B6-94EE735526D54E6A_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-04-01">April 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8364ECF6-7BFB-47AA-831A143BFF5CD965_source.jpg?w=600" alt="Scientific American Magazine Vol 178 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/8364ECF6-7BFB-47AA-831A143BFF5CD965_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8364ECF6-7BFB-47AA-831A143BFF5CD965_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-03-01">March 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C1524D15-DC3C-4460-83ED2D53F9BBD236_source.jpg?w=600" alt="Scientific American Magazine Vol 178 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/C1524D15-DC3C-4460-83ED2D53F9BBD236_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C1524D15-DC3C-4460-83ED2D53F9BBD236_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-02-01">February 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1948/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8DF65468-0994-4485-AE95BB33B56C6B97_source.jpg?w=600" alt="Scientific American Magazine Vol 178 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/8DF65468-0994-4485-AE95BB33B56C6B97_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8DF65468-0994-4485-AE95BB33B56C6B97_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1948-01-01">January 1948</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B187AB41-5CEA-4E82-8809884B94A51809_source.jpg?w=600" alt="Scientific American Magazine Vol 177 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/B187AB41-5CEA-4E82-8809884B94A51809_source.jpg?w=300 300w, 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loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-11-01">November 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F29AE200-E843-4988-98BC22D3AE529B59_source.jpg?w=600" alt="Scientific American Magazine Vol 177 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/F29AE200-E843-4988-98BC22D3AE529B59_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F29AE200-E843-4988-98BC22D3AE529B59_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-10-01">October 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D3678DB7-A5F4-4C0E-839DC3EF2B2D9310_source.jpg?w=600" alt="Scientific American Magazine Vol 177 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/D3678DB7-A5F4-4C0E-839DC3EF2B2D9310_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D3678DB7-A5F4-4C0E-839DC3EF2B2D9310_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-09-01">September 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E0898F7E-54C8-4064-AD21FD17B73B1B0F_source.jpg?w=600" alt="Scientific American Magazine Vol 177 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/E0898F7E-54C8-4064-AD21FD17B73B1B0F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E0898F7E-54C8-4064-AD21FD17B73B1B0F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-08-01">August 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3437D417-59F5-4A9E-9D06FAAF24BD064D_source.jpg?w=600" alt="Scientific American Magazine Vol 177 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/3437D417-59F5-4A9E-9D06FAAF24BD064D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3437D417-59F5-4A9E-9D06FAAF24BD064D_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-07-01">July 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/951F5BCD-EE9D-4272-967537ED347AF6C2_source.jpg?w=600" alt="Scientific American Magazine Vol 176 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/951F5BCD-EE9D-4272-967537ED347AF6C2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/951F5BCD-EE9D-4272-967537ED347AF6C2_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-06-01">June 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EC078B1B-6800-42C8-B6B37C61029103D7_source.jpg?w=600" alt="Scientific American Magazine Vol 176 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/EC078B1B-6800-42C8-B6B37C61029103D7_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EC078B1B-6800-42C8-B6B37C61029103D7_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-05-01">May 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/53FDA8F0-F350-400E-B1E9DD626CBD8A3C_source.jpg?w=600" alt="Scientific American Magazine Vol 176 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/53FDA8F0-F350-400E-B1E9DD626CBD8A3C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/53FDA8F0-F350-400E-B1E9DD626CBD8A3C_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-04-01">April 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/97A3DC31-5A2F-4430-960A32583132663F_source.jpg?w=600" alt="Scientific American Magazine Vol 176 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/97A3DC31-5A2F-4430-960A32583132663F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/97A3DC31-5A2F-4430-960A32583132663F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-03-01">March 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F1157AE7-F1E4-4BED-9157C2245002E821_source.jpg?w=600" alt="Scientific American Magazine Vol 176 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/F1157AE7-F1E4-4BED-9157C2245002E821_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F1157AE7-F1E4-4BED-9157C2245002E821_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-02-01">February 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1947/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/23194E3A-A8C3-4BF7-B605A397280E131E_source.jpg?w=600" alt="Scientific American Magazine Vol 176 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/23194E3A-A8C3-4BF7-B605A397280E131E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/23194E3A-A8C3-4BF7-B605A397280E131E_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1947-01-01">January 1947</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9523ED26-786B-4125-845197835E34E977_source.jpg?w=600" alt="Scientific American Magazine Vol 175 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/9523ED26-786B-4125-845197835E34E977_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9523ED26-786B-4125-845197835E34E977_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-12-01">December 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B3D0197B-B9C6-4A82-8278318D40EE2BE4_source.jpg?w=600" alt="Scientific American Magazine Vol 175 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/B3D0197B-B9C6-4A82-8278318D40EE2BE4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B3D0197B-B9C6-4A82-8278318D40EE2BE4_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-11-01">November 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EC502A38-7538-4417-99397FE63237C3E7_source.jpg?w=600" alt="Scientific American Magazine Vol 175 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/EC502A38-7538-4417-99397FE63237C3E7_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EC502A38-7538-4417-99397FE63237C3E7_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-10-01">October 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/85B4F6FF-FBA7-4553-841FFE5AF24F0B83_source.jpg?w=600" alt="Scientific American Magazine Vol 175 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/85B4F6FF-FBA7-4553-841FFE5AF24F0B83_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/85B4F6FF-FBA7-4553-841FFE5AF24F0B83_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-09-01">September 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DA7C3FAC-AAAD-49F0-BA65B9DD10D05F97_source.jpg?w=600" alt="Scientific American Magazine Vol 175 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/DA7C3FAC-AAAD-49F0-BA65B9DD10D05F97_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DA7C3FAC-AAAD-49F0-BA65B9DD10D05F97_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-08-01">August 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/933C3562-D843-47A4-90C22D4A50C44AA1_source.jpg?w=600" alt="Scientific American Magazine Vol 175 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/933C3562-D843-47A4-90C22D4A50C44AA1_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/933C3562-D843-47A4-90C22D4A50C44AA1_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-07-01">July 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/FB7A91B2-ED8C-4F2C-A757031252CCC4FB_source.jpg?w=600" alt="Scientific American Magazine Vol 174 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/FB7A91B2-ED8C-4F2C-A757031252CCC4FB_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/FB7A91B2-ED8C-4F2C-A757031252CCC4FB_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-06-01">June 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/826B1356-2C72-427A-9A474F4A89E4E418_source.jpg?w=600" alt="Scientific American Magazine Vol 174 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/826B1356-2C72-427A-9A474F4A89E4E418_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/826B1356-2C72-427A-9A474F4A89E4E418_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-05-01">May 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6C3BA48A-F614-4635-B1AFC2F8A81CB904_source.jpg?w=600" alt="Scientific American Magazine Vol 174 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/6C3BA48A-F614-4635-B1AFC2F8A81CB904_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6C3BA48A-F614-4635-B1AFC2F8A81CB904_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-04-01">April 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EE9023B5-081F-4492-8C127EE2BF00E335_source.jpg?w=600" alt="Scientific American Magazine Vol 174 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/EE9023B5-081F-4492-8C127EE2BF00E335_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EE9023B5-081F-4492-8C127EE2BF00E335_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-03-01">March 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AED3C3C6-3B7F-4161-BEAEC3487FA6CFDE_source.jpg?w=600" alt="Scientific American Magazine Vol 174 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/AED3C3C6-3B7F-4161-BEAEC3487FA6CFDE_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AED3C3C6-3B7F-4161-BEAEC3487FA6CFDE_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-02-01">February 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1946/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B8C1DC0A-F93A-49D3-9F1FBE064DB43A32_source.jpg?w=600" alt="Scientific American Magazine Vol 174 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/B8C1DC0A-F93A-49D3-9F1FBE064DB43A32_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B8C1DC0A-F93A-49D3-9F1FBE064DB43A32_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1946-01-01">January 1946</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/553EE9AA-31D9-4860-A08F756DD408B3B9_source.jpg?w=600" alt="Scientific American Magazine Vol 173 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/553EE9AA-31D9-4860-A08F756DD408B3B9_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/553EE9AA-31D9-4860-A08F756DD408B3B9_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-12-01">December 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BEBB8FDD-AA51-4028-9E3243FAA5A1A89D_source.jpg?w=600" alt="Scientific American Magazine Vol 173 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/BEBB8FDD-AA51-4028-9E3243FAA5A1A89D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BEBB8FDD-AA51-4028-9E3243FAA5A1A89D_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-11-01">November 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5AC0B695-ABA0-4CBC-9D8DEFB1E6E8CA58_source.jpg?w=600" alt="Scientific American Magazine Vol 173 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/5AC0B695-ABA0-4CBC-9D8DEFB1E6E8CA58_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5AC0B695-ABA0-4CBC-9D8DEFB1E6E8CA58_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-10-01">October 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/48750537-4513-4830-8B5ADADC0C4D37D3_source.jpg?w=600" alt="Scientific American Magazine Vol 173 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/48750537-4513-4830-8B5ADADC0C4D37D3_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/48750537-4513-4830-8B5ADADC0C4D37D3_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-09-01">September 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C15BFCBF-7E91-4021-88162AF0D17771E1_source.jpg?w=600" alt="Scientific American Magazine Vol 173 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/C15BFCBF-7E91-4021-88162AF0D17771E1_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C15BFCBF-7E91-4021-88162AF0D17771E1_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-08-01">August 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D2FA0F0E-B0B1-47F9-8B1C2C20B2B11F80_source.jpg?w=600" alt="Scientific American Magazine Vol 173 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/D2FA0F0E-B0B1-47F9-8B1C2C20B2B11F80_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D2FA0F0E-B0B1-47F9-8B1C2C20B2B11F80_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-07-01">July 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/005086F3-C97B-4063-B3E3F11C1ED9EB64_source.jpg?w=600" alt="Scientific American Magazine Vol 172 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/005086F3-C97B-4063-B3E3F11C1ED9EB64_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/005086F3-C97B-4063-B3E3F11C1ED9EB64_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-06-01">June 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3CC063E7-E877-476B-A4FC73537BA21BDA_source.jpg?w=600" alt="Scientific American Magazine Vol 172 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/3CC063E7-E877-476B-A4FC73537BA21BDA_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3CC063E7-E877-476B-A4FC73537BA21BDA_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-05-01">May 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3BF217D6-8BFB-4163-86D3AA3216357F18_source.jpg?w=600" alt="Scientific American Magazine Vol 172 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/3BF217D6-8BFB-4163-86D3AA3216357F18_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3BF217D6-8BFB-4163-86D3AA3216357F18_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-04-01">April 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A5187235-36F4-41F2-A83F727C534412D2_source.jpg?w=600" alt="Scientific American Magazine Vol 172 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/A5187235-36F4-41F2-A83F727C534412D2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A5187235-36F4-41F2-A83F727C534412D2_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-03-01">March 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/949D0EBD-19E6-43CD-9D3CEC757F189772_source.jpg?w=600" alt="Scientific American Magazine Vol 172 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/949D0EBD-19E6-43CD-9D3CEC757F189772_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/949D0EBD-19E6-43CD-9D3CEC757F189772_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-02-01">February 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1945/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C8910F34-6C38-4099-BA5B3DD89E79FF7B_source.jpg?w=600" alt="Scientific American Magazine Vol 172 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/C8910F34-6C38-4099-BA5B3DD89E79FF7B_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C8910F34-6C38-4099-BA5B3DD89E79FF7B_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1945-01-01">January 1945</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3C810B8D-2C46-4822-A43D8ED86297E03F_source.jpg?w=600" alt="Scientific American Magazine Vol 171 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/3C810B8D-2C46-4822-A43D8ED86297E03F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3C810B8D-2C46-4822-A43D8ED86297E03F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-12-01">December 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A9D35AFB-C7FD-4D8E-AE1F95057F8CBA50_source.jpg?w=600" alt="Scientific American Magazine Vol 171 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/A9D35AFB-C7FD-4D8E-AE1F95057F8CBA50_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A9D35AFB-C7FD-4D8E-AE1F95057F8CBA50_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-11-01">November 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6521EE57-49F8-434F-ADEEB035493C4A83_source.jpg?w=600" alt="Scientific American Magazine Vol 171 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/6521EE57-49F8-434F-ADEEB035493C4A83_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6521EE57-49F8-434F-ADEEB035493C4A83_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-10-01">October 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B3D35785-F9C6-4665-A5D660727EB93403_source.jpg?w=600" alt="Scientific American Magazine Vol 171 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/B3D35785-F9C6-4665-A5D660727EB93403_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B3D35785-F9C6-4665-A5D660727EB93403_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-09-01">September 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EB75F00A-6555-415C-B4C7AE42C7C68D1A_source.jpg?w=600" alt="Scientific American Magazine Vol 171 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/EB75F00A-6555-415C-B4C7AE42C7C68D1A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EB75F00A-6555-415C-B4C7AE42C7C68D1A_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-08-01">August 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/42633EA9-EE9A-4FCD-A4B6BE55DAF87C70_source.jpg?w=600" alt="Scientific American Magazine Vol 171 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/42633EA9-EE9A-4FCD-A4B6BE55DAF87C70_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/42633EA9-EE9A-4FCD-A4B6BE55DAF87C70_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-07-01">July 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CD36C0D8-08B9-436F-969EAEA99779BA1B_source.jpg?w=600" alt="Scientific American Magazine Vol 170 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/CD36C0D8-08B9-436F-969EAEA99779BA1B_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CD36C0D8-08B9-436F-969EAEA99779BA1B_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-06-01">June 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2DFEE575-8714-4E0B-915B58C38ECE3B3F_source.jpg?w=600" alt="Scientific American Magazine Vol 170 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/2DFEE575-8714-4E0B-915B58C38ECE3B3F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2DFEE575-8714-4E0B-915B58C38ECE3B3F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-05-01">May 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DB8C1B04-6DB4-40A4-BB5414B40AF226BB_source.jpg?w=600" alt="Scientific American Magazine Vol 170 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/DB8C1B04-6DB4-40A4-BB5414B40AF226BB_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DB8C1B04-6DB4-40A4-BB5414B40AF226BB_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-04-01">April 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/243CD5F0-407A-4B77-83AC7A3B8C13BBAC_source.jpg?w=600" alt="Scientific American Magazine Vol 170 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/243CD5F0-407A-4B77-83AC7A3B8C13BBAC_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/243CD5F0-407A-4B77-83AC7A3B8C13BBAC_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-03-01">March 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/76E1F10B-B81C-470B-8FE2C3152CC96C04_source.jpg?w=600" alt="Scientific American Magazine Vol 170 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/76E1F10B-B81C-470B-8FE2C3152CC96C04_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/76E1F10B-B81C-470B-8FE2C3152CC96C04_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-02-01">February 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1944/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CC20806D-3E20-4DDD-A92EA904FE0BF756_source.jpg?w=600" alt="Scientific American Magazine Vol 170 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/CC20806D-3E20-4DDD-A92EA904FE0BF756_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CC20806D-3E20-4DDD-A92EA904FE0BF756_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1944-01-01">January 1944</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D5DA8D41-E3BF-43B5-96A517DFE5D33F68_source.jpg?w=600" alt="Scientific American Magazine Vol 169 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/D5DA8D41-E3BF-43B5-96A517DFE5D33F68_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D5DA8D41-E3BF-43B5-96A517DFE5D33F68_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-12-01">December 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F19CA0F1-4CD6-4351-AB98FC146DF818C0_source.jpg?w=600" alt="Scientific American Magazine Vol 169 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/F19CA0F1-4CD6-4351-AB98FC146DF818C0_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F19CA0F1-4CD6-4351-AB98FC146DF818C0_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-11-01">November 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6E20B2B2-3ADE-48DF-922092E5CDC3CB59_source.jpg?w=600" alt="Scientific American Magazine Vol 169 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/6E20B2B2-3ADE-48DF-922092E5CDC3CB59_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6E20B2B2-3ADE-48DF-922092E5CDC3CB59_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-10-01">October 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/66DD2E46-394F-4E6E-80A82568B2DECBC6_source.jpg?w=600" alt="Scientific American Magazine Vol 169 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/66DD2E46-394F-4E6E-80A82568B2DECBC6_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/66DD2E46-394F-4E6E-80A82568B2DECBC6_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-09-01">September 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F4A10A01-A28D-49CD-9C3F4586426B71FD_source.jpg?w=600" alt="Scientific American Magazine Vol 169 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/F4A10A01-A28D-49CD-9C3F4586426B71FD_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F4A10A01-A28D-49CD-9C3F4586426B71FD_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-08-01">August 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EA878243-DC2D-40F0-93CB66C907209769_source.jpg?w=600" alt="Scientific American Magazine Vol 169 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/EA878243-DC2D-40F0-93CB66C907209769_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EA878243-DC2D-40F0-93CB66C907209769_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-07-01">July 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9B370222-45C6-4793-83255D062E11D390_source.jpg?w=600" alt="Scientific American Magazine Vol 168 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/9B370222-45C6-4793-83255D062E11D390_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9B370222-45C6-4793-83255D062E11D390_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-06-01">June 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8EC13C6D-3532-4E94-BD990C56DCE754BF_source.jpg?w=600" alt="Scientific American Magazine Vol 168 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/8EC13C6D-3532-4E94-BD990C56DCE754BF_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8EC13C6D-3532-4E94-BD990C56DCE754BF_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-05-01">May 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/263CE9D2-12C7-4FDF-A7D6F74E802FE38B_source.jpg?w=600" alt="Scientific American Magazine Vol 168 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/263CE9D2-12C7-4FDF-A7D6F74E802FE38B_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/263CE9D2-12C7-4FDF-A7D6F74E802FE38B_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-04-01">April 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/70678CDE-0422-4C95-9A5C8B3EBA8E3F52_source.jpg?w=600" alt="Scientific American Magazine Vol 168 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/70678CDE-0422-4C95-9A5C8B3EBA8E3F52_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/70678CDE-0422-4C95-9A5C8B3EBA8E3F52_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-03-01">March 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3CAD5412-42C1-4F7F-98331C06C77599A4_source.jpg?w=600" alt="Scientific American Magazine Vol 168 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/3CAD5412-42C1-4F7F-98331C06C77599A4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3CAD5412-42C1-4F7F-98331C06C77599A4_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-02-01">February 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1943/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E5FA06FD-C16C-4C09-958953086792D029_source.jpg?w=600" alt="Scientific American Magazine Vol 168 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/E5FA06FD-C16C-4C09-958953086792D029_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E5FA06FD-C16C-4C09-958953086792D029_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1943-01-01">January 1943</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F5D8AAFC-FB03-4D0B-B4977F85DFBD6F75_source.jpg?w=600" alt="Scientific American Magazine Vol 167 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/F5D8AAFC-FB03-4D0B-B4977F85DFBD6F75_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F5D8AAFC-FB03-4D0B-B4977F85DFBD6F75_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-12-01">December 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E5BB6DCC-F614-46D4-81B94714064BAC2D_source.jpg?w=600" alt="Scientific American Magazine Vol 167 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/E5BB6DCC-F614-46D4-81B94714064BAC2D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E5BB6DCC-F614-46D4-81B94714064BAC2D_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-11-01">November 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DD8BFC7E-B3C8-49A9-9715266B7C9C2DB3_source.jpg?w=600" alt="Scientific American Magazine Vol 167 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/DD8BFC7E-B3C8-49A9-9715266B7C9C2DB3_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DD8BFC7E-B3C8-49A9-9715266B7C9C2DB3_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-10-01">October 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3918A3EA-67D1-49DE-85ADF18AF3C5954F_source.jpg?w=600" alt="Scientific American Magazine Vol 167 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/3918A3EA-67D1-49DE-85ADF18AF3C5954F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3918A3EA-67D1-49DE-85ADF18AF3C5954F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-09-01">September 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/74A41BF9-77D5-4AD2-82799B5105FAF345_source.jpg?w=600" alt="Scientific American Magazine Vol 167 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/74A41BF9-77D5-4AD2-82799B5105FAF345_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/74A41BF9-77D5-4AD2-82799B5105FAF345_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-08-01">August 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/40A8A509-91C3-42BF-A528E85FDA072A9F_source.jpg?w=600" alt="Scientific American Magazine Vol 167 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/40A8A509-91C3-42BF-A528E85FDA072A9F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/40A8A509-91C3-42BF-A528E85FDA072A9F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-07-01">July 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5F31D69A-2AE1-45AE-A5336B93885F86C3_source.jpg?w=600" alt="Scientific American Magazine Vol 166 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/5F31D69A-2AE1-45AE-A5336B93885F86C3_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5F31D69A-2AE1-45AE-A5336B93885F86C3_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-06-01">June 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D1D03ED1-A896-4608-AE4B190E08B63799_source.jpg?w=600" alt="Scientific American Magazine Vol 166 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/D1D03ED1-A896-4608-AE4B190E08B63799_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D1D03ED1-A896-4608-AE4B190E08B63799_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-05-01">May 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/189674A8-1A9D-4CCF-97BBF407E35FE127_source.jpg?w=600" alt="Scientific American Magazine Vol 166 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/189674A8-1A9D-4CCF-97BBF407E35FE127_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/189674A8-1A9D-4CCF-97BBF407E35FE127_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-04-01">April 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/27BDF15D-571B-40FF-A104C0556ECD2441_source.jpg?w=600" alt="Scientific American Magazine Vol 166 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/27BDF15D-571B-40FF-A104C0556ECD2441_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/27BDF15D-571B-40FF-A104C0556ECD2441_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-03-01">March 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/227B2605-A183-4D90-B473B7938CE62869_source.jpg?w=600" alt="Scientific American Magazine Vol 166 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/227B2605-A183-4D90-B473B7938CE62869_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/227B2605-A183-4D90-B473B7938CE62869_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-02-01">February 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1942/01-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/79423BAD-2EAA-4561-AAB3C6D0389BC1BA_source.jpg?w=600" alt="Scientific American Magazine Vol 166 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/79423BAD-2EAA-4561-AAB3C6D0389BC1BA_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/79423BAD-2EAA-4561-AAB3C6D0389BC1BA_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1942-01-01">January 1942</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/50EF97B7-B7C2-436F-984E2A5196CCAC0C_source.jpg?w=600" alt="Scientific American Magazine Vol 165 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/50EF97B7-B7C2-436F-984E2A5196CCAC0C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/50EF97B7-B7C2-436F-984E2A5196CCAC0C_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1941-12-01">December 1941</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/11-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/65CB9D6E-BE39-4D20-B5B97C4FA879C942_source.jpg?w=600" alt="Scientific American Magazine Vol 165 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/65CB9D6E-BE39-4D20-B5B97C4FA879C942_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/65CB9D6E-BE39-4D20-B5B97C4FA879C942_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1941-11-01">November 1941</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/10-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A6705DBE-D95F-4BA9-89503E66D734BBE7_source.jpg?w=600" alt="Scientific American Magazine Vol 165 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/A6705DBE-D95F-4BA9-89503E66D734BBE7_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A6705DBE-D95F-4BA9-89503E66D734BBE7_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1941-10-01">October 1941</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/312524DF-B0AA-4F03-A594957AEB64D8A4_source.jpg?w=600" alt="Scientific American Magazine Vol 165 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/312524DF-B0AA-4F03-A594957AEB64D8A4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/312524DF-B0AA-4F03-A594957AEB64D8A4_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1941-09-01">September 1941</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6FF0322B-47A9-4FF9-B3407D59DB2ECE43_source.jpg?w=600" alt="Scientific American Magazine Vol 165 Issue 2" 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class="issue__date-ozuG1"><time dateTime="1941-05-01">May 1941</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/522EB52F-80F3-4E8B-92753C646F2CECF9_source.jpg?w=600" alt="Scientific American Magazine Vol 164 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/522EB52F-80F3-4E8B-92753C646F2CECF9_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/522EB52F-80F3-4E8B-92753C646F2CECF9_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1941-04-01">April 1941</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C1D9B578-2CC9-42FC-ABC3685C3BF1E308_source.jpg?w=600" alt="Scientific American Magazine Vol 164 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/C1D9B578-2CC9-42FC-ABC3685C3BF1E308_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C1D9B578-2CC9-42FC-ABC3685C3BF1E308_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1941-03-01">March 1941</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1941/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img 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