Ruins of ancient Jerusalem help unravel enigmas of Earth’s magnetic field

Floor tiles from house burnt down by the Babylonians 2, 600 years ago yield data that could help better understand the erratic behavior of the planetary shield protecting us from cosmic radiation https://www.haaretz.com/archaeology/.premium-ruins-of-ancient-jerusalem-help-unravel-enigmas-of-earth-s-magnetic-field-1.9052751

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