NASA Curiosity Rover Discovers Gravel on Mars

Curiosity rover has reportedly discovered gravel which was once carried by the waters of an ancient stream on Mars said National Aeronautics and Space Administration (NASA).

Previously, scientists had found evidence that Mars did one-time had water but this is the first time that they have discovered bed gravels on the Red Planet.

The pictures transmitted by Curiosity show the pebbles have been cemented into layers of conglomerate rock at a site between the north rim of the Gale Crater and the base of Mount Sharp, where Curiosity is heading.

The sizes and the shapes of the rocks give an idea of the speed and the depth of the stream, NASA said.

The scientists estimate the water was moving at a brisk three feet a second and ran somewhere between ankle and hip deep.

Curiosity was launched from Cape Canaveral on November 26, 2011, aboard the MSL spacecraft and successfully landed on Aeolis Palus in Gale Crater on Mars on August 6, 2012.

The Curiosity rover is on a two-year mission to investigate whether it was possible that life was once present on Mars.

The investigation includes the role of water on Mars and planetary habitability studies in preparation for future human exploration.