For years, scientists have been intrigued by mysterious dark streaks running down the slopes of Martian cliffs and craters. These marks, called slope streaks and recurring slope lineae (RSLs), have ...

For decades, scientists believed that long, dark streaks on the surface of Mars were a sign of something crucial: running water. These streaks, first spotted by NASA’s Viking mission in 1976, sparked ...

New research suggests Mars' slope streaks are the result of wind and dust, not water. © NASA/JPL-Caltech/University of Arizona In 1976, NASA’s Viking mission ...

For years, scientists have been looking for signs of liquid water just beneath the surface of Mars. The problem, though, is that the observations from various orbiting probes have been maddeningly ...

Scientists have found seismic clues that suggest liquid water may be hiding beneath Mars' surface. By listening to the echoes of "marsquakes" — seismic waves rippling through Mars' crust — researchers ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A HiRISE image of the heavily eroded ridge of an inverted channel left behind by a dried up river ...

We were as excited as anyone when MARSIS (the Mars Advanced Radar for Subsurface and Ionosphere Sounding) experiment announced there was possibly liquid water under the southern polar ice cap. If ...

Skylights, openings in the surface of Mars that descend down into caves, have been found on Mars, along with signatures for the presence of water ice. Possible giant "karstic" caves that formed when ...

NASA has lost contact with one its three spacecraft orbiting Mars, the agency announced Tuesday. Meanwhile, a second Mars ...

On November 26, 2011, the NASA Curiosity rover launched to Mars. Curiosity was the biggest and most powerful rover anyone had ever sent to the Red Planet. The two-ton science laboratory is about the ...

A NASA spokesman denied on Thursday that the space agency is running a child slave colony on Mars, populating it with kidnapped children. Radio host Alex Jones, known for presenting conspiracy ...