Thursday, May 30, 2013

Nasa: Pebbles Find Supports Mars Life Theory

Scientists have discovered pebbles on Mars - evidence that a stream once flowed on the planet and giving more weight to the theory that it was once able to support life.

Nasa's Curiosity rover last year came upon hundreds of smooth, round pebbles that look strikingly similar to deposits in river banks on Earth.

Researchers say the roundness of the stones, believed to be two billion years old, was shaped by a fast-flowing stream that probably was ankle to waist-deep.

The report's authors noted that conditions on Mars at the time the pebbles were deposited were vastly different to the cold, dry environment of the present day.