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kirbyeli58kirbyeli58 kirbyeli58kirbyeli58
  • 25-02-2017
  • Health
Answered

how do scientists know that earth's magnetic poles have reversed many times during history

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kellylovely
kellylovely kellylovely
  • 26-02-2017

In ocean basalts ,as the sea floor slowly spreads igneous rock which is comprised cools and congeals,recording earth current

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