David Pogue sets out on a worldwide quest to find the key molecules and chemical reactions that have paved the way for human civilization, life, and even the universe as we know it. Stream all three episodes of NOVA l PBS' “Beyond the Elements” now on the PBS Video app. | PBS

60K views · 294 reactions | David Pogue sets out on a worldwide quest to find the key molecules and chemical reactions that have paved the way for human civilization, life, and even the universe as we know it. Stream all three episodes of NOVA l PBS' “Beyond the Elements” now on the PBS Video app. | PBS | Facebook

252K views · 1.3K reactions | Researchers expose longstanding discrimination against women in science. Stream NOVA l PBS' "Picture a Scientist" now on the PBS Video app. | PBS | Facebook