Saturday, June 20, 2009

Ancient Lake on Mars - Maybe

"New images show evidence of ancient Martian lake"
The Associated Press (June 19, 2009)

"New images suggest Mars had a sizable lake on its surface billions of years ago, further evidence that the planet had a watery past. Images snapped by NASA's Mars Reconnaissance Orbiter reveal a 30-mile-long canyon where water once flowed and beach remnants surrounding a basin.

Dubbed the Shalbatana lake for the valley it's located in, scientists believe it is about the size of Lake Champlain that borders the United States and Canada....
"

That picture shows how the Shalbotana lake might have looked, around 3,400,000,000 years ago.

Not everybody's entirely convinced that it's a lake. One scientists said that he'd like to see something besides images, before being sure that it was a body of water. Makes sense to me: although it will probably be a while before any explorer from Earth - robotic or otherwise - gets to that particular spot.
Other posts, about "Mars, Mostly."

Related posts, at

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