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Dec 5, 2013 08:00 AM ET // Becky Oskin, LiveScience
A dense crystalline 'rain' falling into Earth's mantle could explain how a mysterious seismic boundary forms beneath the crust.
Sep 15, 2011 03:03 PM ET // Tim Wall
Diamond inclusions indicate that Earth's carbon cycle extends from the surface to the deep lower mantle.
Mar 10, 2011 06:42 PM ET // Christina Reed
NASA geophysicists find natural cycles to Earth's warming that correlate to movement of liquid iron in Earth's outer core -- up until 1930.