Mars Probably Once Had A Huge Ocean

"Science Daily - UC Berkeley geophycists are providing strong evidence
that Mars once had an ocean. Naysayers have argued that what appear to
be ancient coastlines near the North Pole are too warped to be true
seashores. The researchers claim, however, that this anomaly resulted
from the tilt of Mars' spin axis 2 to 3 billion years ago, possibly
because the weight of surface water made the planet tip like a
weighted top."

http://www.sciencedaily.com/releases...0613131912.htm

Double-A