10 Unsolved Martian Mysteries

For decades, humanity has been launching missions to Mars, in hopes of making sense of the enigma that is our solar system's most Earth-like planet. And as with all good mysteries, many of our investigations have simply led to more questions. » 11/28/11 10:24am 11/28/11 10:24am

Phobos Will Be the Next Victim of Moon-Killing Mars

Martian moons Phobos and Deimos may have once had a lunar sibling. The discovery of a pair of elliptical craters on Mars’ surface have led astronomers to speculate that a small moon may have held an unsteady orbit around the planet, only to be dragged down by Mars’ gravity and destroyed. And one thing is for certain:… » 10/26/08 8:00am 10/26/08 8:00am