<https://www.popsci.com/ancient-jars-hold-clues-about-intensity-earths-magnetic-field/#webpage>
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"2017-02-14T06:16:53+00:00"^^<http://schema.org/Date>
<https://www.popsci.com/ancient-jars-hold-clues-about-intensity-earths-magnetic-field/?amp>