The results of Earth-bound lab experiments appear to back up the theory that dark lines on Martian slopes are created by water.
The ExoMars life-scouting rover mission to Mars will stay on the ground an extra two years.
Will the first astronaut on Mars work for SpaceX or NASA -- or both?
SpaceX plans to send an unmanned Dragon capsule to Mars as early as 2018.
A bombardment of asteroids on a once-icy ancient Mars may have created vast oceans of liquid water, which persisted for 200 million years.
The president introduced his week-long stint as guest presenter on the Science Channel’s DNews Minute by talking about how critical Mark Kelly’s long stay in space is for the future of space travel.
Dust devils are a common feature on the Martian surface, but seeing one of these extraterrestrial whirlwinds in action through the eyes of a Mars rover is a special joy.
On Mars, formerly water-filled craters transformed to dry mile-high mounds with the help of wind.
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