That GPS unit on your car sure is fancy, but pigeons have got you beat: they have GPS built right into their brain!
Researchers have spotted a group of 53 cells within pigeons' brains that respond to the direction and strength of the Earth's magnetic field.
The question of how birds navigate using - among other signals - magnetic fields is the subject of much debate.
These new "GPS neurons" seem to show how magnetic information is represented in birds' brains.
Facinating all the same, just dont agree with the author's use of the term/analogy is all...