Mars appears to have had running water on its surface about one million years ago, according to new evidence.
Images from a Nasa spacecraft orbiting the Red Planet show fan-shaped gullies on the surface which seem to be about 1.25 million years old, the study says.
They believe the channels were sculpted by surface water from melting ice.
http://news.bbc.co.uk/1/hi/sci/tech/7919113.stm