Archaeologists have discovered that massive spikes in magnetic activity have actually hit the Earth during humanity’s existence. By analyzing the orientation of metal from ancient jars, scientists found a spike to over 20% of the normal strength of the field, enough that today, there would be widespread electrical problems. Indeed, the spikes are so strong that they effectively invalidate all known models of the Earth’s magnetic field. We’re in for a bit of a rethink, it appears.
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