Scientists theorize that many millions of years ago, Mars had rings, just like Saturn. And it looks like the red planet could be due for a new set of rings in the future. How exactly would this happen ...

Add Yahoo as a preferred source to see more of our stories on Google. A "selfie" taken by NASA Like Earth and the solar system's other planets, Mars formed roughly 4.5 billion years ago. Early in its ...

Mars may have once had an ocean so vast that it covered one-third of the planet before evaporating billions of years ago and leaving behind a telltale sign: a flat band of land, outlining the former ...

WASHINGTON, April 15 (Reuters) - There is a lot of evidence from orbiting satellites and surface rovers indicating that liquid water was present long ago on the surface of Mars in the form of ponds, ...

"The possible existence of an ocean suggests that a large body of water may have persisted for a long time. That could have been an important ingredient for life." When you purchase through links on ...