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NASA/JCL-Caltech/MSSS |
NASA's Curiosity rover has discovered evidence of an ancient, flowing stream on Mars at the rock outcrop pictured here, named 'Hottah' after Hottah Lake in Canada's Northwest Territories. It appears to be an ancient streambed, suggesting that water once flowed massively across the planet. The rover used its Mast Camera to examine rocks on its way to Glenelg Intrigue, a junction between three types of terrain.
The rocks Curiosity photographed are made of sandy rock interspersed with large pebbles and formed a large mass. Detailed observation of the rock showed that it was a composite, essentially a rock made of other rocks. The tiny rocks, called clasts, were embedded in the overall structure and appeared rounded. Scientists believe that the rocks bumped into each other on their arduous journey, smoothing the rough edges along the way.
Curiosity has now traveled to a location about two to four miles from an alluvial fan, a triangle-shaped network of channels on a slope that indicates water may have pushed material downward, spreading as it flowed. Researchers believe the flow lasted over hundreds of millions of years.
This blogger has long wondered about life on other planets--not the little green spaceman variety--but other life forms that have civilization of some kind. Thanks to Curiosity, we just might find that life existed on the Red Planet at some time.