Just like these fridge magnets. A magnet attracts or repels ... A magnet has opposite ends called a north pole and a south pole. Between the poles is a magnetic force that we can’t see.

in which the planet’s north and south magnetic poles swap places. While such an event is not expected to happen any time soon, they have occurred periodically throughout Earth’s history—the last ...

Your navigation system just got a critical update, one that happens periodically because Earth’s magnetic north pole keeps moving. Here’s what to know.