One of Mars' moons is on a collision course with the red planet! But don't worry, it won't happen for another 5 million years or so. Join Guy Raz and Mindy Thomas on an extraterrestrial adventure, as they learn all about gravity, orbits and all the Who, What, When, Where, Why, How and Wow in the World science behind celestial physics!

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.