Mars Moons Could Once Have Been Comets, Says Astronomers

Astronomers have long puzzled over the origins on Phobos and Demos, the red planet’s strangely-shaped moons. Now they are pondering an entirely new explanation. Astronomers have long puzzled over the origins on Phobos and Demos, the red planet’s strangely-shaped moons. Now they are pondering an entirely new explanation. The Sciences All Articles | Discover Magazine