Titov was a Soviet cosmonaut and the second man to orbit the Earth, preceded just months earlier by Yuri Gagarin, with whom he had trained. At 25 years old, Titov was selected to fly the Vostok 2 mission and spent 25 hours in space, completing 17 Earth orbits. The mission brought him several impressive designations: youngest person to fly in space, first person to experience space sickness, and first person to sleep in space. Though he overslept, what strange occurrence initially kept him up? Discuss
Source: The Free Dictionary