NASA have said that Mars was once abundant with water and that their rover Opportunity has found the evidence.

The Meridiani Planum, where the rover landed contains rocks which show unmistakable signs that they were once in contact with lots of water.

"These rocks were modified in liquid water and may have been precipitated in water," said scientist Steve Squyres.

Source

"they were once in contact with lots of water."

Yea so....carbon date the bitches already! WE WANNA KNOW IF THE DAMN ALIENS ARE THERE! heh, for real, they need to move on that, life in any form usually exists around water or ice. If there are underground storages of unfrozen water that would change all understandings currently of mars.