Day or night, rain or shine, wherever they're released,  trained pigeons can find their way home over distances as high as almost 1,000 kilometers (around 600 miles). It's a skill humans have made use of since time immemorial. And for around a century, scientists have known that magnetoreception plays a part in the birds' navigational cocktail.  A research team from the University of Bonn and the Max Planck Institute of Animal Behavior wrote in the journal Science this week that a core part of