Both can cause widespread human and ecological devastation. But picking a winner in a destruction derby is a tough call.
The planet's magnetic field seems to be 10 times weaker than it was six months ago.
The 'boring billion:' the long evolutionary pause when algae ruled the Earth, might be due to stalled plate tectonics.
Scientists for the first time have gotten a glimpse of an elusive mineral, inside a 4.5-billion-year-old meteorite, and have named it bridgmanite.
Four-billion-year-old sample suggests modern-day Iceland is our best bet for an example of how Earth's continents first formed.
A neutrally buoyant layer may be floating between two layers deep in the Earth.
As a seafloor volcano continues to erupt in a remote part of the Pacific Ocean, a newborn island has swallowed its neighbor whole, images from space show.
Electrical light shows known as earthquake lights may occur at rifts, or nearly vertical faults in the Earth's crust, new research suggests.
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