Deimos

A Badarse New Theory On The Origin Of Mars’ Moons 

A Badarse New Theory On The Origin Of Mars’ Moons 

Phobos and Deimos, Mars’ lumpy, runty moons, were once pegged as captured asteroids. But the truth is shaping up to be far more interesting. These ruddy satellites could be the lone survivors of a giant impact that eviscerated half of Mars’ surface billions of years ago.