Alien visitors to planet Earth are boycotting genetically modified (GM) crops, claims a leading scientist. Buck Uranus, chief astronomer for the William H Carpenter Foundation in Nevada, believes the extraterrestrials are refusing to create crop circles in GM maize, wheat and other cereals because of fears of possible side-effects. The scientist has conducted a major survey of crop circles created over the past five years and says he has not found a single example left in fields containing GM crops. "In my spare time, I channel messages from alien beings," said Uranus, "and from what I've been hearing, these guys...