Magnetism is a powerful force that can attract one object to another. It is found in nature, but it also can be made by using electricity. The opposite is true, too: Magnetism can be used to make electricity. Electromagnetismthe close relationship between these forcesmakes possible many important things in modern life, from electric motors and power generators to lasers, cell phones, and computers. It is also one of the basic forces in nature. For more information, read Thomas Edison and the Developers of Electromagnetism, another book in the Mission: Science series.