A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction ...

We now show that migratory monarch butterflies have an inclination magnetic compass that allows them to orient in the proper southern direction during the fall migration. The inclination compass ...

On the left appears a Han dynasty magnetic compass, in which a lodestone spoon rotates on a brass plate, while on the right is shown a smartphone with an internal magnetometer (Photo ...

A compass is able to point toward magnetic north because it contains a magnet that orients itself along the magnetic field lines that extend between the north and south magnetic poles ...

The magnetic compass — used in navigation for hundreds of years — is a tool that helps you find your way. Good beginner hiking/orienteering compasses can be found online or in outdoor sections ...

Researchers at Harvard wanted a compass not only sensitive to the size of a magnetic field, but also its direction. Such compasses exist, but they’re not great; the quality of their readings can ...