Transcription: Dinosaur species had unique ways of attacking and defending against enemies. The Tyrannosaurus rex lived through the Jurassic and Cretaceous periods. They were about 50 feet long and often preyed on the stegosaurs, 30-foot dinosaurs with long spiked tails that could swing back and forth freely to fend off enemies. Stegosaurs were unique in that their tails lacked the rigid tendons that stiffened the tails of most other dinosaur species. Thank you.
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