Earth & Energy

A new study used signatures in ancient rocks to identify the magnetic polarity states of the era when the rocks were formed. The analysis showed that the Earth did not always have two strong poles. There was a time when the planet's magnetic field went haywire: weak magnetic fields coming from several poles, coming in all sorts of directions before eventually reverting back to its strong dipolar state.

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New Research Reveals Earth Used to Have Several Magnetic Poles

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