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How do ancient pottery give scientists clues about earths magnetic field flip? Why is it more precise that rocks?
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How do ancient pottery give scientists clues about earths magnetic field flip? Why is it more precise that rocks?

User Arjen De Jong
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Thanks to the magnetic properties of iron-oxide particles found in clay – which record the intensity of Earth's magnetic field when heated – scientists have discovered a hidden history of Earth's fluctuating magnetic field in the years from 750 to 150 BC.

User Leonardo Alves
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