The Earth's magnetic field may flip towards the end of the next millennium according to Danish geophysicists, exposing the Earth to harmful cosmic radiation in the process. In the past century, the magnetic north pole has moved over 1000 km towards the geographical north pole, and over the past decade the strength of the magnetic field has fallen by 1%. New measurements made in Greenland by the Danish Meteorological Institute (DMI) show that the magnetic north pole is moving northwards at 20 km a year - 2 km a year faster than 12 months ago.
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