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

NOVA Now is back and breaking down the science behind the headlines. 🎙️ This week, we’re stretching it out and exploring the science of exercise and—after more than a year of unexpected interruption—getting back in the game. Listen to the full episode on Apple Podcasts or wherever you go to find your podcasts: https://apple.co/3j7qPmd | NOVA l PBS