00:00Earth's magnetic field records ancient history like a secret tape recorder.
00:04It records past pole flips right on the ocean floor.
00:07Hot lava locks in the Earth's magnetic direction as it cools.
00:10These stripes reveal ancient pole reversals, proving continents move.
00:14For more Earth secrets, find the link in bio.
00:16Discover why it's a tape recorder.
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