Ancient Flood
Ancient Flood
Image courtesy U.Arizona/NASA
A craggy valley carved by fast-flowing water possibly a billion years ago highlights this June 3 image taken by NASA's Mars Reconnaissance Orbiter from 179 miles (286 kilometers) above Mars's surface.
Diverse geological landforms, which predate the ancient flood, have been left to erode in the harsh, present-day Martian environment.
Published July 12, 2013
