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Earth's mantle, not its core, may have generated planet's early magnetic field

A trio of studies are the latest developments in a paradigm shift that could change how Earth history is understood. They support an assertion by a geophysicist that a once-liquid portion of the lower mantle, rather than the core, could have exceeded the thresholds needed to create Earth's magnetic field during its early history.

from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2020/03/200315102257.htm
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