Did You Know?
The Tyrannosaurus Rex effects were achieved by means of a miniature remote-controlled puppet, a man in a suit, and a full-sized, 16-foot-tall robot. However, only a handful of shots involved the full-size robot, which had too narrow a range of movements to be convincing. The man in the suit proved equally cumbersome and was scrapped. Thus, most F/X shots were accomplished with the remote-control miniature and even some hand puppets.
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The main dinosaur in this movie is a Deinonychus but can be confused for the more commonly used Velociraptor. The other dinosaur to appear was a Tyranosaurus Rex.
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In addition to the many characters named after birds, two of the principals are named after science fiction writers. Dr. Jane Tiptree (Diane Ladd) - James Tiptree Jr. (the pen name of author Alice Bradley Sheldon) and 'Doc' Smith (Raphael Sbarge) - Edward E. Smith (Known as "Doc").
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The skin material of the full sized, mechanical T. Rex was fabricated by Kenneth J. Hall's company Total Fabrication. The process took five weeks.
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While Diane Ladd appears in this movie, her daughter, Laura Dern appeared in another dinosaur film, Jurassic Park.
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