NASA's Rover found ripples in Martian rock that resemble the wave patterns on a sandy lake bed on Earth. The ripples could only have come from liquid water.

Scientists confirm the existence of liquid water on Mars, altering our understanding of the Red Planet. Evidence of wave ripples formed by water and w ...

"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." ...

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

The decades-old mystery of Martian water is getting a new twist! New evidence points to the possibility that Mars once had lakes of liquid water, not just ice, and NASA is keen to discover what ...

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.

"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." New research suggests that temperatures on ancient Mars ...

"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 ...