Full title: Forget global warming, worry about the MAGNETOSPHERE: Earth's magnetic field is collapsing and it could affect the climate and wipe out power grids 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. But this magnetic field, so important to life on Earth, has weakened by 15 per cent over the last 200 years. And this, scientists claim, could be a sign that...