By Will Dunham WASHINGTON (Reuters) - It may not be wise to get into a scrap with a coconut crab. Its claw is a mighty weapon. Scientists on Wednesday said they measured the pinch strength of this ...

Robot Claw Shows Intricacies of Crab Courtship Scientists in Australia use robotic crab claws to explore the attributes female fiddler crabs look for in a mate. Male fiddler crabs are lopsided.