Mars Express observes clusters of recent craters in Ares Vallis
Friday, October 7, 2011 - 08:01
in Astronomy & Space
(PhysOrg.com) -- Newly released images taken by ESAs Mars Express show an unusual accumulation of young craters in the large outflow channel called Ares Vallis. Older craters have been reduced to ghostly outlines by the scouring effects of ancient water.