The Earth's Magnetic Field Is At Least 3.7-Billion-Years Old, New Evidence Shows - IFLScience
The Earth's Magnetic Field Is At Least 3.7-Billion-Years Old, New Evidence Shows IFLScienceResearchers find oldest undisputed evidence of Earth's magnetic field Phys.orgEvidence of Earth's magnetic field dates back 3.7 billion years WNBJ 39
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