Before humans went into space in the 1960s, several other animals were launched into space, including numerous other primates, so that scientists could investigate the biological effects of spaceflight. The United States launched flights containing primate passengers primarily between 1948 and 1961 with one flight in 1969 and one in 1985. France launched two monkey-carrying flights in 1967. The Soviet Union and Russia launched monkeys between 1983 and 1996. Most primates were anesthetized before lift-off.
Overall, thirty-two non-human primates flew in the space program; none flew more than once. Numerous backup primates also went through the programs but never flew. Monkeys and non-human apes from several species were used, including rhesus macaque, crab-eating macaque, squirrel monkeys, pig-tailed macaques, and chimpanzees.
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