Earth's Magnetic Field Almost Completely Collapsed 550 Million Years Ago - Universe Today
Earth's magnetic field nearly collapsed during the Early Cambrian period of geologic history. Luckily for us, it regenerated.
More than half a billion years ago, Earth experienced an almost-complete collapse of its magnetic field. It began in the early Cambrian period. Then, after a period of about 15 million years, the fie… [+5407 chars]
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