Now firmly in its final science mapping orbit, NASA’s Mars Reconnaissance Orbiter is releasing a torrent of science data back to Earth. The latest photo release shows dozens of sites visited by the spacecraft in the first week of October 2006. A breathtaking image shows gullies in an unnamed crater in the Terra Sirenum region of Mars. Scientists believe the gullies were formed during a time when liquid water flowed across the surface of the Red Planet.
https://www.nasa.gov/mission_pages/MRO/multimedia/pia01923.html