Terra Planet Earth on MSN

The day Earth almost lost its magnetic field: What kept the shield alive

Earth’s magnetic field nearly collapsed long ago. What saved it explains why life survived and why the planet remains ...
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Earth’s magnetic field isn’t just a shield, scientists say it’s a leak

Earth’s magnetic field has long been framed as a planetary force field, a protective bubble that keeps the worst of the Sun’s radiation at bay. Increasingly, though, scientists are finding that this ...