This method revealed that seismic waves travelling near the poles were moving faster ... powering the Earth's magnetic field. Since this donut region has 'floated' to the top of the liquid outer ...
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Seismic echoes reveal a mysterious 'donut' inside Earth's coreOverall, the waves detected closer to the poles were traveling ... including the new-found donut of lighter elements—will help us better understand Earth's magnetic field. In particular, how ...
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