Iron Age Potters Carefully Recorded Earth's Magnetic Field — By Accident

The planet’s magnetic field is weakening. Scientists aren’t sure why, but studying ancient jars could help them find out. The ceramics provide a remarkable window onto Earth’s magnetic past.

(Image credit: Image courtesy of Oded Lipschits)

Source: Iron Age Potters Carefully Recorded Earth's Magnetic Field — By Accident | News : NPR

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