A model showing the layers of Earth

The Woman Who Found the Earth’s Inner Core

Inge Lehmann was the seismologist and mathematician who figured out what the Earth's core was actually made of.
Compass On Antique Map magnetic poles

What Happens if Earth’s Magnetic Poles Reverse?

What would happen if the Earth's magnetic poles flipped? Earth’s magnetic poles have a long history of switching from North to South and back again. 

Kepler Finds Truly Earth-like World

The Kepler telescope discovers a habitable planet.