What was the purpose of the mission sts-107?

STS-107 was the 28th flight of NASA's Space Shuttle program and the final mission of the Space Shuttle Columbia. Launched on January 16, 2003, its primary purpose was to conduct scientific research and technology demonstrations in microgravity. The mission featured 80 experiments in various fields, including Biology, physics, and materials science. Tragically, the mission ended in disaster when Columbia disintegrated during re-entry on February 1, 2003, resulting in the loss of all seven crew members.