Add Yahoo as a preferred source to see more of our stories on Google. The sound of bagpipes could soon make it into space [Reuters/Getty Images] "Imagine you're a Martian, you're just about to invade ...

Introduced species generally get a bad press – but not all alien invaders are villains, says Ken Thompson in Where Do Camels Belong? WE HAVE all heard a lot of bad stuff about introduced species: they ...