Extended missions cause 'space fever' in astronauts: Study
Astronauts floating weightlessly through space experience a persistent fever, with their body temperature increasing by about 1ÂºC, as per a Germany-based study on space station astronauts. Researchers found the astronauts' core body temperature increased gradually over 2.5 months, reaching 38ÂºC. During exercise, the temperature exceeded 40ÂºC, as sweat evaporates more slowly in space than on Earth.