By analyzing the pottery from an archaeological dig near Jerusalem, scientists have learned that the geomagnetic field around the earth fluctuated wildly during early human civilizations —and the news isn't good for a world that depends on electrical grids and high-tech devices. Jeff and Anthony discuss magnetic fields, scientific sleuths, and Santa Claus.

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Today’s story was sent in by Geneman67: https://arstechnica.com/science/2017/02/astonishing-geomagnetic-spike-hit-the-ancient-kingdom-of-judah/

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