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An unknown process is causing Mercury's surface to swell, according to new data from NASA's MESSENGER probe. | NASA/JHUAPL/CIW-DTM/GSFC/MIT/Brown University. Rendering by James Dickson and Jim Head
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Mystery Rising Within Mercury

Mystery is rising within Mercury. Learn why mystery is rising within Mercury and find out about the extra solid layer of iron-sulfide in its core.

Published On 03/21/2012
3:00 AM EDT