OK, It Ain't Quite a Canal, But It's Definitely Something!

NASA's Opportunity rover has found strong evidence that the area it's exploring was once home to liquid water. Not a terribly surprising finding, I don't think -- it's long been believed likely that Mars had a wet environment in the distant past -- but still pretty cool.

There's a nice analysis of the announcement and what it means here, on Oliver Morton's MainlyMartian blog, which I found via Jay Manifold's A Voyage to Arcturus. Looks like a pretty good blog for those interested in Martian geology; I'll have to read more of it later.