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This is a citation of an outside article. Gravyday is not responsible for its content. Original URL below.

Earth's magnetic field flipped 42,000 years ago, creating a climate 'disaster'
See you on the flip side.
A reversal in Earth's magnetic field thousands of years ago plunged the planet into an environmental crisis that may have resembled "a disaster movie," scientists recently discovered. (more)

Reported By: www.livescience.com