主题：【火星探索】火星曾经是水淋淋的 -- 西风陶陶

NASA于星期二公布“机会号”火星探测器的发现：火星表面曾经有河流，有湖泊，这些地方曾经都是适宜生命生存的。

Mars Once 'Drenched with Water,' NASA Says

WASHINGTON (Reuters) - Mars was once "drenched with water," so much that life could easily have existed there, NASA said on Tuesday.

The robot explorer Opportunity has seen clear evidence of the main goal of Mars exploration -- that water once flowed or pooled on the Red Planet's surface.

"Opportunity has landed in an area of Mars where liquid water once drenched the surface," NASA associate administrator Ed Weiler told a news conference. "Moreover, this area would have been good habitable environment."