"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 fainter early on." ...

NASA's Rover found ripples in Martian rock that resemble the wave patterns on a sandy lake bed on Earth. The ripples could ...

Formations that look like jumbo-sized kidney beans (or blobs of chocolate syrup, depending on your palette) may be indicators of whether Mars was habitable in the distant past.

Harvard scientists studying the mystery of water and life on ancient Mars believe they may have finally found a solution.

Whether Mars ever had liquid water has long been a subject of debate among scientists, and a study published recently offers compelling evidence. Researchers evaluating data collected by NASA’s ...

Scientists confirm the existence of liquid water on Mars, altering our understanding of the Red Planet. Evidence of wave ripples formed by water and wind 3.7 billion years ago suggests Mars could ...

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

Mars' alternating warm and cold periods may have influenced its ability to retain liquid water, potentially impacting life.

"This research shows us that Mars' climate was dramatically different in the distant past," Joe McNeil of the Natural History Museum in London said in a statement. "The mounds are rich in clay ...

In 1975, NASA’s Viking mission tested Martian soil for microbial life using liquid water. A recent theory suggests this approach may have destroyed microbes adapted to Mars' dry, salt-driven ...

But never before have we seen that surface liquid water once existed on Mars. “The shape of the ripples could only have been formed under water that was open to the atmosphere and acted upon by ...

"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 fainter early on," team leader Danica Adams, NASA Sagan Postdoctoral ...