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Early magnetic field around Earth was even stronger than previously believed
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Evidence That Early Magnetic Field Around Earth Was Even Stronger Than Scientists Previously Believed
:focal(1000x752:1001x753)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/ef/20/ef200431-75ca-4ccb-9a11-ecfedf9f1e32/istock-157642745.jpg "Earth's Magnetic Field Could Take Longer to Flip Than Previously Thought | Science| Smithsonian Magazine")