Mars once had water warm enough to sustain life

We know that Mars once had lots of water, considered a prerequisite for habitability. What hasn't been known, however, is just how friendly — or unfriendly — this water might have been to life, as the temperature and chemical conditions of ancient Martian water has remained a complete mystery. But as a new analysis… » 11/19/12 8:00am 11/19/12 8:00am

Curiosity makes its first major discovery on Mars — and it’s a doozy

NASA scientists working with Curiosity have announced that water did indeed flow on Mars at one point in its history — and we're not talking trickles. A newly discovered ancient streambed indicates that the water ran fast and deep, possibly as much as hip deep. The discovery marks a precedent setting achievement for… » 9/28/12 7:40am 9/28/12 7:40am

The Opals that the Martian Sea Left in its Wake

The question at this point isn't whether Mars was once covered in liquid water — it's just a question of how long that water was there before it evaporated. This image provides new evidence that water washed the Martian shores for a tremendously long time. Long enough to reshape the rocks in that crater and to leave… » 10/28/08 4:14pm 10/28/08 4:14pm

Yes, There Is Water on Mars — But You Can't Drink It

Click to viewThough NASA has been reporting for years that there is water ice on Mars, today the US space agency held a press conference to announce definitively that the Phoenix Lander has found traces of water ice on the red planet. As Phil Plait over at Bad Astronomy points out, today's announcement was really… » 7/31/08 3:00pm 7/31/08 3:00pm