Certain substances can become magnetic when exposed to an external magnetic field. Magnetic susceptibility measures how ...

There are several theories about how the Earth and the Moon were formed, most involving a giant impact. They vary from a model where the impacting object strikes the newly formed Earth a glancing blow ...

Explore the history and science of magnetism! From magnetite and compasses to Gilbert's discoveries, Oersted's electromagnetism, & Faraday's demonstrations. Learn about magnetic fields and more. Trump ...