NASA’s Columbia Space Shuttle landed at the Kennedy Space Center, concluding mission STS-90.
STS-90 was the last Columbia mission that landed during the day and the last mission to carry the European Space Agency’s Spacelab module into orbit. The sixteen-day mission’s primary objective was to use the Neurolab Spacelab module to study the effects of microgravity on the nervous system. Tests were performed on several animals, including fish, crickets, mice, and even the astronauts themselves.