Enos, the chimpanzee, was launched into space on the Mercury-Atlas 5 Mission.
Enos became the first chimpanzee, and the third primate to orbit Earth, preceded only by the Russian cosmonaut’s Yuri Gagarin and Gherman Titov. Enos clocked more than 1,000 hours of training before the mission, including exposure to weightlessness and high g-forces. The following Mercury mission sent the first American, John Glenn, into Earth’s orbit.