“One of the goals [of astrobiology] is to go to [other worlds] and look for microorganisms, but in the meantime there’s so ...

Take a road trip through Nevada to this moon-like crater used by NASA astronauts as a training ground to prepare them for the lunar landscape.

Jo Marchant, author of The Human Cosmos, and Smithsonian science editor Carlyn Kranking revel in auroras through the ages and ...