One of Nature's most fascinating mysteries is how pigeons find their way home over vast distances.
No matter how far away they are taken, they almost always return to their lofts.
Now German scientists believe they have discovered how the birds do it. Research has revealed that tiny iron structures in their beaks allow them to analyse the earth's magnetic field - much like a compass.
Through the signals picked up, the birds can work out where they are and set out on the best course home.
As w...