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Jul 17, 2013 10:03 AM by Stephen Bowers

Belief growing that Mars had ocean

A report from Space.com says that scientists studying Mars have found more evidence to suggest Mars had a massive ocean. They say that ocean likely existed millions of years ago. 

The report says photos NASA's Mars Reconnaissance Orbiter, which circles our neighboring planet, show what appears to be an ancient river delta that flowed into the ocean. That ocean may have covered up to one-third of the Red Planet.

The researchers say the delta features small inverted channels, or ridges that form along river bottoms over time as gravel and other materials are deposited on the river bottoms. While evidence of water has been found before, most evidence in the past has suggested the existence of lakes rather than large oceans.

The exact size of the ocean is still unknown, but it is expected to have covered at least 38,600 square miles.

This study was published on July 12 in the Journel of Geophysical Research.

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