The part of a compass that moves around to show the magnetic field is called the needle because you can make a simple compass out of a sewing needle. First the needle must be magnetised by rubbing ...

Who knew that magnetic fields could be so useful? Astronomers are able to use magnetic fields to map our environment within ...

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.

which forms electrical currents that generate the magnetic field in a process called a dynamo. His team hopes to find out how Earth’s field forms and evolves. “Any theory they’re able to ...