Researchers have built a robot crab that can compete in claw-waving displays with real fiddler crabs, but "Wavy Dave" doesn't always come out unscathed. When you purchase through links on our site, we ...

A robot posing as a tough male crab recently challenged real crabs to a showdown during mating season — and the videos are hilarious. The robot, nicknamed "Wavy Dave," infiltrated fiddler crab (Afruca ...