Weird Geological Features Spied on Mars

Mars has seen its fair share of mysteries and this new observation of a series of pits with raised rims is baffling geologists.

May 7, 2013
12:39 PM EDT
Wide context view of the strange geological features discovered by the HiRISE camera on NASA's Mars Reconaissance Orbiter (MRO) at the southern edge of Acidalia Planitia on Mars. Click image to see the whole region. | NASA/JPL/University of Arizona