A magnetic compass, including the compasses on most smart phones, does not point to the North Pole, or even to the North Magnetic Pole. Instead, it points away from True North by an angle known as ...

We call this “map ... magnetic compass, there is some angular difference between the two points, which varies depending on where you are on the Earth. In Europe, this difference, known as ...

Now, our new study of Eurasian reed warblers has found that this remarkable ability involves a “magnetic map” that works ... Magnetic declination – the difference between the direction ...