The Earth is not alone in this fickleness: The sun's magnetic shield appears to reverse its polarity approximately every 11 years. Even our Milky Way galaxy is magnetized, and experts say it ...

Likewise, a wire passing through a magnetic field creates an electric current within the wire. This is the basic principle that allows electric motors and generators to operate. In the Earth (see ...

The Earth acts like a giant bar magnet, with a magnetic north and south pole ... In the last 100 million years, the poles have switched nearly 200 times, with the last switch happening ...