Mars may once have held enough water to fill oceans and form coastlines. The planet’s red dust contains water and likely formed in cold conditions.

Robotic rovers have found clear evidence that billions of years ago, lakes and rivers of liquid water coursed across the red planet’s surface. This means that at some point in the distant past ...

Researchers have found new evidence for a massive subsurface ocean on Mars, again raising the possibility of microbial life.

Mars may be drenched beneath its surface, with enough water hiding ... equator is representative of the rest of the red planet, the underground water would be enough to fill a global ocean a ...