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in touch with the scientific world!</div> <div class="pop-br"></div> </div> </div> </div> <div id="content-wrapper-bg"> <div id = "content-page"> <h1 style="margin-bottom: 10px" class="title">Physical Sciences</h1> <dl class="search-results apachesolr_search-results"> <dt class="title"> <a href="https://www.science20.com/robert_walker/first_public_comments_on_nasas_draft_plans_to_keep_earth_safe_for_its_mars_sample_return_in_2033_now_closed_for">First Public Comments On NASA’s Draft Plans To Keep Earth Safe For Its Mars Sample Return In 2033- Now Closed For Commenting</a> </dt> <dd> <p class="search-snippet"> biosphere before 2039 So we can 1. sterilize <strong>all</strong> samples or 2. test for life first- return samples to a safe ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - May 17 2022 - 3:35pm</p> </dd> <dt class="title"> <a href="https://www.science20.com/a_definition_of_motion/blog/necessary_interconnections-180650">Necessary Interconnections?</a> </dt> <dd> <p class="search-snippet"> other objects within the universe. With a simple thought experiment, the interconnectedness between <strong>all</strong> ...</p> <p class="search-info">Blog Post - <a href="https://www.science20.com/profile/scott_perry" title="View user profile.">Scott Perry</a> - Nov 12 2016 - 3:45pm</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_inventor/is_it_possible_to_build_a_spacesuit_or_spaceship_to_travel_through_the_sun_with_future_tech_just_for_fun-148174">Is It Possible To Build A Spacesuit Or Spaceship To Travel Through The Sun With Future Tech?- Just For Fun.</a> </dt> <dd> <p class="search-snippet"> you are inside it, you will experience no gravitational force at <strong>all</strong>. That is also- supposing it is ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - Apr 11 2016 - 7:32am</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_inventor/is_the_international_space_station_the_most_expensive_single_item_ever_built-156922">Is The International Space Station The Most Expensive Single Item Ever Built?</a> </dt> <dd> <p class="search-snippet"> some time in the next couple of decades. Same for <strong>all</strong> our space stations. Space is a harsh environment ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - May 6 2017 - 4:12pm</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_inventor/imaginary_bullshit_planet_nibiru_lens_flares_sun_mirages_hoaxes_just_plain_silly-159176">"Imaginary Bullshit Planet" Nibiru- Lens Flares, Sun Mirages, Hoaxes & Just Plain Silly</a> </dt> <dd> <p class="search-snippet"> photoshopped into the sky It takes two 1.4 gigapixel images every minute, <strong>all</strong> night, every night, looking for ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - Nov 14 2016 - 9:48am</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_walker/protecting_mars_and_earth_from_what_and_why_bother_our_inheritance_of_unopened_astrobiological_treasure_chests">Protecting Mars- And Earth- From What- And Why Bother? Our Inheritance Of Unopened Astrobiological Treasure Chests</a> </dt> <dd> <p class="search-snippet"> do you remember and how many of Robert Zubrin’s? <strong>ALL</strong> PLANETARY PROTECTION EXPERTS AGREE WITH RUMMEL ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - May 29 2018 - 6:08pm</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_walker/will_first_mars_astronauts_stay_in_orbit_teleoperating_sterile_rovers_to_protect_earth_and_mars_from_colliding">Will First Mars Astronauts Stay In Orbit- Tele-operating Sterile Rovers- To Protect Earth And Mars From Colliding Biospheres? </a> </dt> <dd> <p class="search-snippet"> environment. The answer to <strong>all</strong> this is to find out a little about our microbial neighbours before planning an ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - May 1 2021 - 1:50pm</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_inventor/blog/how_easy_would_it_be_to_communicate_with_musical_ets_as_in_close_encounters_of_a_third_kind-125915">How Easy Would It Be to Communicate with Musical ETs- as in "Close Encounters Of A Third Kind"?</a> </dt> <dd> <p class="search-snippet"> use a blind person's white cane, but we do have some spatial experience of sounds <strong>all</strong> the same. ...</p> <p class="search-info">Blog Post - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - Sep 24 2015 - 6:23pm</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_inventor/will_we_meet_et_microbes_on_mars_why_we_should_care_deeply_about_them_like_tigers-143786">Will We Meet ET Microbes On Mars? Why We Should Care Deeply About Them- Like Tigers</a> </dt> <dd> <p class="search-snippet"> evolved microbe ET would have <strong>all</strong> the same microscopic structures as these, working in exactly the same ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - Dec 24 2016 - 10:59am</p> </dd> <dt class="title"> <a href="https://www.science20.com/robert_inventor/how_to_keep_earth_safe_samples_from_mars_sterilized_or_returned_to_above_geostationary_orbit_op_ed-166448">How To Keep Earth Safe- Samples From Mars Sterilized Or Returned To Above Geostationary Orbit- Op Ed</a> </dt> <dd> <p class="search-snippet"> crater, or by wind erosion. There may be deposits that match <strong>all</strong> those criteria. But you can't tell ...</p> <p class="search-info">Article - <a href="https://www.science20.com/profile/robert_walker" title="View user profile.">Robert Walker</a> - Jun 16 2023 - 3:03pm</p> </dd> </dl> <div class="item-list"><ul class="pager"><li class="pager-current first">1</li> <li class="pager-item"><a href="/physical_sciences/feed?page=1" title="Go to page 2" class="active">2</a></li> <li class="pager-item"><a href="/physical_sciences/feed?page=2" title="Go to page 3" class="active">3</a></li> <li class="pager-item"><a href="/physical_sciences/feed?page=3" title="Go to page 4" class="active">4</a></li> <li class="pager-item"><a href="/physical_sciences/feed?page=4" title="Go to page 5" class="active">5</a></li> <li class="pager-item"><a href="/physical_sciences/feed?page=5" title="Go to page 6" class="active">6</a></li> <li class="pager-item"><a href="/physical_sciences/feed?page=6" title="Go to page 7" class="active">7</a></li> <li class="pager-item"><a href="/physical_sciences/feed?page=7" title="Go to page 8" class="active">8</a></li> <li class="pager-item"><a href="/physical_sciences/feed?page=8" title="Go to page 9" class="active">9</a></li> <li class="pager-ellipsis">…</li> <li class="pager-next"><a href="/physical_sciences/feed?page=1" title="Go to next page" class="active">next ›</a></li> <li class="pager-last last"><a href="/physical_sciences/feed?page=435" title="Go to last page" class="active">last »</a></li> </ul></div> </div> <div id="sidebar-right"> <div id="sb-block-block-25" class="sb-r-block"> <h3>Know Science And Want To Write?</h3> <div class="block-content">Apply for a column: <a href="mailto:writing@science20.com">writing@science20.com</a></div> </div> <div id="sb-block-quicktabs-forumswag" class="sb-r-block"> <h3>Donate or Buy SWAG</h3> <div class="block-content"><div id="quicktabs-forumswag" class="quicktabs_wrapper quicktabs-style-basic"><ul class="quicktabs_tabs quicktabs-style-basic"><li class="qtab-0 active first"><a href="/physical_sciences/feed#quicktabs-forumswag" id="quicktabs-tab-forumswag-0" class="qt_tab active">Donate</a></li><li class="qtab-1 last"><a href="/physical_sciences/feed#quicktabs-forumswag" id="quicktabs-tab-forumswag-1" class="qt_tab active">SWAG</a></li></ul><div id="quicktabs_container_forumswag" class="quicktabs_main quicktabs-style-basic"><div id="quicktabs_tabpage_forumswag_0" class="quicktabs_tabpage"> <div id="sb-block-block-31" class="sb-r-block"> <div class="block-content"><p>Please donate so science experts can write<br> for the public. <p>At Science 2.0, scientists are the journalists,<br> with no political bias or editorial control. 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