"Our study is consistent with growing research that early Mars was at least a transiently watery world with a much denser atmosphere than we see today," said Dufek. "We were only able to study one bomb sag at one location on the Red Planet. We hope to do future tests on other samples based on observations by the next rover, Curiosity."
MORE: http://www.sciencedaily.com/releases/2012/05/120504135732.htm
See also...
Hubble to Use Moon as Mirror to See Venus Transit
http://www.sciencedaily.com/releases/2012/05/120504135730.htm
