NASA's Project Mercury was the United States' first human-in-space program. Between 1961 and 1963, six astronauts carried out successful one-person spaceflights that offered physicians and scientists the first opportunity to observe the effects of living in space on the human body.
NASA's Project Mercury was the United States' first human-in-space program. Between 1961 and 1963, six astronauts carried out successful one-person spaceflights that offered physicians and scientists the first opportunity to observe the effects of living in space on the human body.
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