The reversal of the Earth’s magnetic field.This can happen at any time, whenever the Earth’s magnetic field is craving attention—on average it happens about once every half a million years. The reversal itself isn’t the problem—it’s thetransitionthat’s dangerous. While the field is ...
These stories appear in the international media with depressing frequency. Those not closely involved might wonder why, if lemurs are so special, they have not been properly protected yet. Surely Madagascar can't afford to lose its lemurs and the world can't just stand by and watch it happen?