mononychus olecranus: a turkey-sized long-legged fossil 75 million years old found in the Gobi Desert having bird-like fused wrist bones and keeled breastbone and a long tail resembling a dinosaur's; short forelimbs end in a single claw instead of wings; classification as bird or dinosaur is in dispute
living thing: a living (or once living) entity
russian roulette: a stunt in which you spin the cylinder of a revolver that is loaded with only one bullet and then point the muzzle at your head and pull the trigger