Trivia: In one version of the script, Martin finds another videotape of his father Seth. This tape would show Seth (who is in his part-fly form) explaining the "cure". This scene would have required Jeff Goldblum to be in make-up for five hours, and he didn't want to go through that, so he dropped out, and the scene was cut from the script.
Trivia: At the end of the movie, the mutated Bartok was played by director Chris Walas' brother Mark.
Trivia: Geena Davis was originally going to reprise her role of Veronica Quaife. But, after learning that Veronica would die during child birth, she pulled out.
Chosen answer: They were studying the mutation. It was cruel to keep the animal alive, but they didn't care about that.
wizard_of_gore