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"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

The new work suggests that the edge of the dichotomy was eroded back by hundreds of kilometers during the time when an ocean ...

The southern highlands of Mars (which cover about two-thirds of the planet's surface) rise as much as 5 or 6 kilometers ...

Discoveries of clay minerals in Martian mounds by researchers indicate that Mars once had large bodies of water billions of ...

"Rootless cones form when lava flows over wet or icy ground, causing it to boil and explode," said Dundas. "The region around ...

Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' ...

Scientists confirm the existence of liquid water on Mars, altering our understanding of the Red Planet. Evidence of wave ...

Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 ...

The car-sized Curiosity rover has spotted evidence of once quite hospitable environs on Mars.

The study of ancient lava formations on Mars is the most complete to date from a series of observations conducted on the ...

The planet is the seventh largest and is currently inhabited solely by robots. However, the space agency is working hard to ...