Glad You Asked S2 E5

YouTube Originals presents Vox’s Glad You Asked, an ensemble-led exploration of topics driven by our curiosity about the world around us. Producers Cleo Abram, Alex Clark, Joss Fong, and Christophe Haubursin share in their reporting as they discover why we cry, how the internet works, and if we'll ever survive on mars. Their intersecting journeys reveal unexpected answers.