If shrunken down to micron size, a compass needle could wobble. (Courtesy: iStockphoto/tobias machhaus) A tiny magnetic needle just 10 μm long could be used to create a magnetic-field sensor that – if ...

A magnetometer is a device that measures magnetism: the direction, strength, or relative change of a magnetic field at a ...

Quick – can you tell where north is? Animals as diverse as sea turtles, birds, worms, butterflies and wolves can, thanks to sensing Earth’s magnetic field. But the magnet-sensing structures inside ...

In the early 2000s, the North Magnetic Pole increased its speed to 55 kilometers per year, but over the past five years, it has suddenly slowed from 50 to 40 kilometers per year. The magnetic North ...

Iron, steel, nickel and cobalt are magnetic close magneticAble to be magnetised or attracted to a magnet. materials and would feel the force from a nearby magnet. All other materials that do not ...