Mysteries in Nili Fossae

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These new images from the high-resolution stereo camera on ESA’s Mars Express show Nili Fossae, one of the most enticing regions on Mars. This ‘graben system’ lies northeast of the volcanic region of Syrtis Major on the northwestern edge of the large Isidis impact basin – and intriguing hints of methane have been seen here.

via ESA Space Science

http://www.esa.int/Our_Activities/Space_Science/Mars_Express/Mysteries_in_Nili_Fossae