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/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")
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Why does Earth have a Magnetic Field? - YouTube
Earth's magnetic field nearly died during critical transition | Ars Technica
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3.4 Earth's Magnetic Field – Physical Geology, First University of Saskatchewan Edition
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Earth's Magnetic Field Is 3.5 Billion Years Old | WIRED
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Earth's magnetic field: Explained | Space
