Ancient Mars Had Ice-free Lakes in Gale Crater
by Brian Wang from NextBigFuture.com on (#6TMAN)
Symmetrical wave ripples identified with NASA's Curiosity rover in ancient lake deposits at Gale crater provide a key paleoclimate constraint for early Mars: At the time of ripple formation, climate conditions must have supported ice-free liquid water on the surface of Mars. These features are the most definitive examples of wave ripples on another planet. ...