Without the effects caused by the spinning Earth, the magnetic fields generated within the liquid core would cancel one another out and result in no distinct north or south magnetic poles.

The magnetic north pole, where compass needles point, is about 1,200 miles south and is where geomagnetic field lines are vertical. Earth’s magnetic north is not static. Like an anchorless buoy ...

Thus, if we can date the rocks, we can tell north from south in that era. Reversals don’t happen instantly, but over a period of thousands of years as the magnetic field gradually weakens. Though its ...

The magnetic field is shown by lines with arrows that point from north to south. You can tell how old some coins are by testing them with a magnet. 5p and 10p coins made before January 2012 are ...