Earth is surrounded by a magnetic field generated by electric currents from within the planet. Compasses take advantage of this field to identify north and serve as a navigational aid. But one social ...

A compass made of light promises to be more sensitive than anything in a Boy Scout’s wildest dreams. A light beam shot through a blob of rubidium atoms can directly and reliably measure the size and ...

Magnetic compasses have long served as an indispensable navigation tool, using Earth's magnetic field to point the way. But there are specific locations on our planet where magnetic compasses either ...

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

Loaded with bells and whistles, the Silva Ranger 2.0 has everything you’ll need to orient in the wild. This budget compass has most of the features of high-end models, including night navigation ...