A sleight-of-hand magic trick which often catches humans out only fools monkeys with opposable thumbs - a trait shared with humans, new research suggests.Scientists performed a famous magic trick for three species of monkey - capuchins, squirrel monkeys and marmosets - with differing hand structures.

A sleight-of-hand magic trick which often catches humans out only fools monkeys with opposable thumbs - a trait shared with humans, new research suggests.Scientists performed a famous magic trick for three species of monkey - capuchins, squirrel monkeys and marmosets - with differing hand structures.