Compasses point north – that's a pretty constant fact of life. But it hasn't always been the case, as the north and south poles actually flip on a semi-regularly basis. Exactly how long this process takes has been up for debate, and now a new study suggests it happens far more slowly than we previously thought.
.. Continue Reading Earth's magnetic field reversals may take much longer than we thoughtCategory: Environment
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from New Atlas (Gizmag) https://ift.tt/2ZKix7d
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