Earth Changes: New Research Reveals What May Be Responsible for Next Magnetic Field Flip of Earth
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If you could travel back in time 41,000
years to the last ice age, your compass would point south instead of
north. That’s because, for a period of a few hundred years, the Earth’s
magnetic field was reversed. These reversals have happened repeatedly
over the planet’s history, sometimes lasting hundreds of thousands of
years. We know this from the way it affects the formation of magnetic minerals, that we can now study on
the Earth’s surface.Several ideas exist to explain why magnetic field reversals happen. One of these just became more plausible. My colleagues and I discovered that regions on top of the Earth’s core could behave like giant lava lamps, with blobs of rock periodically rising and falling deep inside our planet. FULL REPORT