Answer :
Over the past 100 million years of earth's history, it is known that the magnetic poles have reversed themselves many times.
The last time Earth's poles flipped in a major reversal was about 780,000 years ago, during the Brunhes-Matuyama reversal, as scientists call it. The fossil record reveals no significant changes in plant or animal life.
Scientists believe that the charges generated by moving metallic material move in a circular motion around Earth's equatorial region, generating the north and south magnetic poles at the surface.
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