3.2 billion-year-old surprise: Earth had strong magnetic field

Geophysicists at the University of Rochester announce in today’s issue of Nature that the Earth’s magnetic field was nearly as strong 3.2 billion years ago as it is today.

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<p><a href="http://www.physorg.com/news94911308.html">3.2 billion-year-old surprise: Earth had strong magnetic field</a></p> <p>Geophysicists at the University of Rochester announce in today’s issue of <i>Nature</i> that the Earth’s magnetic field was nearly as strong 3.2 billion years ago as it is today. </p>