Is Earth's magnetic field getting weaker? Dramatic dips spotted across the Western Hemisphere could damage satellites

June 23, 2014 1:29 PM

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Earth's magnetic field is a protective shield for our planet from cosmic radiation, but it's also somewhat of a mystery - scientists aren't sure why it moves and changes in intensity.

Earth's magnetic field is a protective shield for our planet from cosmic radiation, but it's also somewhat of a mystery - scientists aren't sure why it moves and changes in intensity.

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