Gooseneck McCarthy has never been accused of taking life too seriously. Professor Ruddle offers him a hundred dollars to test an experimental time machine, and that is about as much scientific motivation as the wandering hobo needs. His instructions are simple: travel 110 million years into the past, photograph what he sees, move one rock, and come straight back.The trip works. The trouble begins afterward. Details in the laboratory have changed, the professor remembers a life McCa...