Aurora chasers are on high alert for geomagnetic storm conditions overnight with northern lights possible at mid-latitudes.

If all the compasses in the world started pointing south rather than north, many people might think something very strange, very unusual, and possibly very dangerous was going on. Doomsayers would ...

"It's a big, chaotic and turbulent ball of molten iron going around in the ... is the potential for a full magnetic reversal, during which the North and South Poles would flip entirely.