In 1998, John Glenn returned to space at the age of 77.
John Glenn first made history in 1962 as the first American to orbit the Earth. As a Payload Specialist on the Space Shuttle Discovery, he became the oldest person to fly in space and the only one to fly in both the Mercury and Space Shuttle programs. During the shuttle mission, Glenn conducted a series of investigations into the physiology of the human aging process.
Learn more at During the 1998 shuttle mission, Glenn conducted a series of investigations into the physiology of the human aging process..
