When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right ... and generators to operate. In the Earth (see image below right), the ...

Earth’s magnetic field, generated by movements within its molten iron core, serves as a protective shield against solar winds ...

Essentially, the molten iron at the core of our planet helps to determine where Earth’s magnetic field downs down. A diagram showing how the Earth’s magnetic field points downward and also how ...

Earth’s magnetism is pretty easy to forget about, being invisible to the human eye and all that. But it’s more important than you might think. The Earth acts like a giant bar magnet ...

David Bressan is a geologist who covers curiosities about Earth. Without its magnetic field, life on Earth would not be possible since this shields us from harmful cosmic radiation and charged ...