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<!DOCTYPE html> <html lang="en"> <head> <title>Science.gov</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <meta name="description" content="Science.gov is a gateway to government science information provided by U.S. Government science agencies, including research and development results."> <link rel="stylesheet" href="/styles/main.css"> <link rel="icon" href="/images/favicon.ico" type="image/x-icon"> <script> function scrollToTop(){ if (document.documentElement.scrollTop > 200) { document.getElementById("backToTop").style.setProperty('right', '0px'); } else { document.getElementById("backToTop").style.setProperty('right', '-100px'); } } </script> <style> main#home{ margin: 0; width: 100%; max-width: 100%; flex: 1 0 auto; display: flex; flex-direction: column; } div#hero { background: #fff url("images/SciGov_hero_1920.webp"); background-size: cover; flex: 1 0 auto; } div#hero aside { background-color: #015683; width: 370px; margin: 3em; text-align: center; position: relative; } div#hero aside p { color: #fff; font-size: 200%; line-height: 1.25em; text-align: left; padding: 1em 1em .5em 1em; margin-bottom: 0; } div#hero aside button { margin-bottom: 1em; font-size: 120%; font-weight: bold; } div#partners{ background-color: #e7f0f9; } div#CENDI{ font-family: Barlow, Candara, Arial, sans-serif; font-size: 16px; font-weight: bold; display: flex; align-items:center; justify-content: center; margin-top: 1em; } div#CENDI img{ margin-left: .5em; width: 100px; height: 45px; } div#agencies{ text-align: center; margin: 1em; } div#agencies h2{ font-weight: bold; font-family: Barlow, Candara, Arial, sans-serif; font-size: 16px; margin: 0 0 .25em 0; } div#agencies img{ margin-right: .5em; height: 84px; width: 100px; } </style> <!-- Google tag (gtag.js) --> <script async src="https://www.googletagmanager.com/gtag/js?id=G-PL8SK8Q34R"></script> <noscript><!--508 compliance--></noscript> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-PL8SK8Q34R'); </script> <noscript><!--508 compliance--></noscript> </head> <body onscroll="scrollToTop()"> <noscript>Some elements on this page will not display correctly without Javascript.</noscript> <header id="top"> <div id="official-site-container"> <input id="how-you-know" type="checkbox"> <div id="official-site"> <img src="/images/us_flag.png" alt="US Flag">An official website of the United States government <label for="how-you-know">Here's how you know <span class="material-symbols-outlined expand_more">expand_more</span><span class="material-symbols-outlined expand_less">expand_less</span></label> </div> <div id="official-site-info"> <section> <img src="/images/icon-dot-gov.png" alt="dot gov icon"> <div> <div><strong>Official websites use .gov</strong></div> <div>A <strong>.gov</strong> website belongs to an official government organization in the United States.</div> </div> </section> <section> <img src="/images/icon-https.png" alt="https lock icon"> <div> <div><strong>Secure .gov websites use HTTPS</strong></div> <div>A <strong>lock ( <span class="material-symbols-outlined lock">lock</span> ) or https://</strong> means you've safely connected to the .gov website. 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