This means that their magnetism is there all the time and cannot be turned on or off as it can with an electromagnet. Converting a magnet to a non-magnet is called demagnetisation. Magnets are ...

Changes in the field can also play havoc with satellite communication and electric infrastructure, disrupting the modern world in a big way. Given the importance of this gargantuan bar magnet in our ...

Many people will remember experiments in school with iron filings and bar magnets to unveil their magnetic field. It's not quite so easy to capture the magnetic field of the Milky Way though.