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

NASA used animals before sending humans into space.

Chimps, the First Space Explorers Before Mercury Astronauts

Enos the chimp is escorted by airman Michael Berman, left, and M/Sgt. Edward Dittmar on his return to Patrick Air Force Base after his space flight, Dec. 1, 1961, at Patrick Air Force Base, Fla. (Bettmann/CORBIS)

Slideshows

ABC News on Facebook