The mass of the Earth's solid inner core has been a thorn in our understanding of how the interior of our planet works.
Both can cause widespread human and ecological devastation. But picking a winner in a destruction derby is a tough call.
There were twice as many of the biggest earthquakes in the first quarter of 2014.
Guess what Earth's been hiding from us, way down in its belly? Water! Lots and lots of water.
A previously unknown magnetic field appears to be polarizing radio emissions from two vast lobes projecting from the Milky Way's core. ->
NASA geophysicists find natural cycles to Earth's warming that correlate to movement of liquid iron in Earth's outer core -- up until 1930.