Was there flowing water on Mars? Scientists think yes, though not because of the "canals" that some people used to think might be evidence. (Trying to remember: was this ever taught as a working theory?)
This image serves as proof to the people who work on such things, that Mars not only had water but "meandering" water. The delta pattern seems to be the standard sort of delta that might occur after a river deposits stuff over time.
So, are we looking at a Martian Louisiana of millions of years ago? (Would there be Martian Cajuns? Would they look like James Carville?)
The
full story. (And thanks to whomever sent me this one...)
(This image also fits into the "Earth as Art" category, except that it's Mars.)