Mars rover finds rippled rocks caused by waves: Nasa

"This is the best evidence of water and waves that we've seen in the entire mission," said Ashwin Vasavada, Curiosity's project scientist at Nasa's Jet Propulsion Laboratory in California. The rover, which has been exploring Mars since 2012, beamed back stunning pictures of rippled patterns on the surface of rocks caused by the waves of a shallow lake billions of years ago.