Chimps in Space: Ham, Enos Flew Mercury Capsules Before Astronauts

Enos, a 5-year-old chimpanzee, reclines in the flight couch in which he was launched from Cape Canaveral, Fla. for the Mercury-Atlas 5 mission, Nov. 29, 1961. Enos was the first chimp to orbit Earth. Astronaut John Glenn followed on Feb. 20, 1962. (Bettmann/CORBIS)