The Earth's magnetic field and oxygen evolved together over 540 million years, according to a major NASA study.
Our Sun is far from a smooth, white ball in the sky. Twisting and looping magnetic field lines rise from its surface like hair, causing dark, transient patches on the surface called sunspots wherever ...
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Earth’s magnetic field flips often, and some reversals drag on 70,000 years
Earth’s magnetic field is often described as a steady shield, but the geological record tells a more restless story. Polarity flips, when magnetic north and south swap places, happen several times per ...
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