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 ...

Dancing turtles show how animals use magnetic field as a map Dancing turtles have ... to navigate using the magnetic field lines that stretch from Earth's north to south pole.

A map shows the Pacific Ring of Fire ... outer core—the dynamo-like process that generates the magnetic field that protects life on Earth from harmful cosmic rays. "Flow in the outer core ...

the angle at which magnetic field lines intersect the Earth. The turtles use these two pieces of information, which vary at every point on the planet's surface, as navigational markers that help ...