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

989K views · 10K reactions | September 12-17th, we're spotlighting U.S. education, with eleven films and documentaries, including special episodes of NOVA l PBS, FRONTLINE and PBS NewsHour, a new film from POV, the premiere of TED TALKS, “The Education Revolution,” and concluding with the 5th annual AMERICAN GRADUATE DAY. More: pbs.org/spotlighteducation | PBS | Facebook

1.2K views · 12 reactions | Are you ready for severe weather? The...