1-148-986 - NASA/Oxford Science Archive/Heritage Images

John H Glenn, American astronaut, May 1998. In October 1998, the STS-95 mission flew from the Kennedy Space Center with the aim of examining the effects of space flight and ageing, for which Glenn was the test subject. During the 3.5 million mile journey, over eighty scientific experiments were carried out to learn more about the human body and how the Sun affects life on Earth. Glenn made his first space flight in 1962.