Earth's magnetic field has weakened by 15 per cent over the last 200 years Could be a sign that the planet's north and south poles are about to flip If this happens, solar winds could punch holes into the Earth's ozone layer This could damage power grids, affect weather and increase cancer rates Evidence of flip happening in the past has been uncovered in pottery As the magnetic shield weakens, the spectacle of an aurora would be visible every night all over the Earth Deep within the Earth, a fierce molten core is generating a magnetic field capable of defending our planet against devastating solar winds. The protective field extends thousands of miles into space and its magnetism affects everything from global communication to animal migration and weather patterns. Experts believe we're currently overdue a flip, but they're unsure when this could occur. If a switch happens, we would be exposed to solar winds capable of punching holes into the ozone layer.
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