Friday, April 16, 2010

Widening Gullies On Mars Point To Liquid Water

NASA's Mars Reconnaissance Orbiter shows gullies near the
edge of Hale crater on southern Mars. Credit: NASA


From Cosmos:

WASHINGTON, D.C.: Changes in gullies on Mars suggest that there is flowing water on the red planet, scientists said.

Martian gullies carved into hill slopes and the walls of impact craters were discovered several years ago. On Earth, gullies usually form through the action of liquid water – long thought to be absent on the Martian surface because the temperature and atmospheric pressure were believed to be too low.

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