Dorothy Spangenberg's laboratory is jammed with 20,000 jellyfish - four times more than usual - because of NASA's delay in launching the space shuttle Columbia.

The biologist from Eastern Virginia Medical School plans to send 2,700 tiny, young jellyfish on a research mission to study their metamorphosis in a gravity-free environment.Those leaks are fixed now, and NASA plans to launch Columbia in early December on an astronomy mission. The flight with Spangenberg's jellyfish, Columbia's next trip, is targeted for May.

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