syncereh16
syncereh16 syncereh16
  • 05-12-2017
  • Biology
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How many times has earth's magnetic field reversed polarity in the last 4 million years? ( Its not 5)

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llcooljo88
llcooljo88 llcooljo88
  • 05-12-2017
The have been 17 reversals in the span of 4 million years
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