<p>Launch: June 5, 1991 
Landing: June 14, 1991 Edwards Air Force Base, Cal.
Astronauts: Bryan D. O'Connor, Sidney M. Gutierrez, James P. Bagian, Tamara E. Jernigan, M. Rhea Seddon, F. Drew Gaffney and Millie Hughes-Fulford
Space Shuttle: Columbia
The fifth dedicated Spacelab mission, Spacelab Life Sciences-1, and first mission dedicated solely to life sciences, using the habitable module. Subjects were humans, 30 rodents and thousands of tiny jellyfish.
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