"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 ...

Sometimes, the best innovative ideas come from synthesizing two previous ones. We've reported before on the idea of having a ...

Though it's a cold, dead planet, Mars still has its own natural beauty about it. This image shows us something we'll never ...

Harvard scientists explain how Mars had warm spells billions of years ago, allowing rivers and lakes to exist.

The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for ...