A permanent magnet is always magnetic. It has an invisible magnetic field. Only certain materials, such as iron, feel a magnetic force. Permanent magnets can come in lots of different shapes and ...

Magnetic fields are produced by electrical currents that are generated by various astrophysical objects. The study of magnetic fields seeks to understand their origin, as well as the acceleration ...

Would a dramatic change in the Earth's magnetic field affect creatures that rely on it during migration? Late on a January night in 1993 I found myself on a beach on the Pacific coast of Costa ...

A solution proposed by a team of scientists at the North Carolina State University is a metamaterial that can change shape in response to magnetic fields. This material had to be easily deformable ...

As well as a few temporary reversals, the Earth's magnetic field – just like the Sun – can flip over long timescales. During the Brunhes–Matuyama reversal, the magnetic north could have been ...