Submitted by somethingX t3_122dugg in askscience
[deleted] t1_jdr9ebe wrote
Reply to comment by dukesdj in Around 550 million years ago the earth's magnetic field almost collapsed, but then strengthened a few million years later. Scientists say this may have been due to the formation of the inner core. But why exactly would that cause the magnetic field to get stronger? by somethingX
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