275K views · 281 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

4.1K reactions · 267 shares | Archaeologists embark on the biggest dig in a generation at Pompeii. Stream the landmark new series, Pompeii: The New Dig, on the PBS App. | PBS | Facebook