The Earth's magnetic field is crucial to life on the planet. It keeps out harmful solar winds, which would strip away our atmosphere and surface water and bombard us with radiation if left unchecked. A new analysis of zircon minerals suggests that the field originated at least 4.2 billion years ago – a hop after the planet formed in the geological timeline, and much earlier than previously thought.
.. Continue Reading Earth's magnetic field may be more than 750 million years older than previously thoughtSection: Science
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from Gizmag Emerging Technology Magazine http://ift.tt/1LUleaI
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