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Earth science

Geomagnetism under scrutiny

New calculations show that the electrical resistance of Earth's liquid-iron core is lower than had been thought. The results prompt a reassessment of how the planet's magnetic field has been generated and maintained over time. See Letter p.355

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Figure 1: Temperature profile of Earth's interior.

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Correspondence to Bruce Buffett.

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Buffett, B. Geomagnetism under scrutiny. Nature 485, 319–320 (2012). https://doi.org/10.1038/485319a

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