Mars Once Had a Ring Ring systems aren't actually all that uncommon. When you think about ring systems, your mind immedi…

Mars Once Had a Ring

Ring systems aren't actually all that uncommon. When you think about ring systems, your mind immediately leaps to Saturn, no doubt - but half the planets in the Solar System have rings, Saturn, Uranus, Neptune, and Jupiter. Dwarf planet Haumea, and centaurs Chiron and Chariklo also have rings.

And Mars?