More than 50 years of missions to Mars paint a clear picture of a cold, dry, desert planet. And at the same time, photographs, minerals, and other data tell scientists that Mars once had as much water as Earth, or even more. Why are the two planets so different today?We're excited to feature an episode from our friends over at Stereo Chemistry, where they talk to scientists about the latest research on Mars’s water and where they think the water went.You can find Stereo Chemistry on C&EN’s website, cen.acs.org (http://cen.acs.org), or wherever you listen to podcasts.

Podden och tillhörande omslagsbild på den här sidan tillhör American Geophysical Union. Innehållet i podden är skapat av American Geophysical Union och inte av, eller tillsammans med, Poddtoppen.