Just when you thought Mars was dead, it goes and surprises you. Images released from the Mars Global Surveyor show new gullies on the surface of Mars that formed within the last 7 years. The shape and path taken down the slope suggests that they were carved by rushing liquid water. It’s possible that there are quantities of liquid water underneath the surface, which can escape to the surface from time to time. Even though Mars can get cold, researchers think that water spurting out of the ground could last long enough to carry debris down the slope of a hill before freezing solid.
NASA Images Suggest Water Still Flows in Brief Spurts on Mars