A giant lava lamp inside Earth might be flipping its magnetic field

If you could travel back in time 41,000 years to the last ice age, your compass would point south instead of north.

That’s because for a period of a few hundred years, the Earth’s magnetic field was reversed.

These reversals have happened repeatedly over the planet’s history, sometimes lasting hundreds of thousands of years.

Read more: http://www.dailymail.co.uk/sciencetech/article-4508350/Giant-lava-lamp-inside-Earth-flip-magnetic-field.html#ixzz4hFKbOUay
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Source: A giant lava lamp inside Earth might be flipping its magnetic field

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