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In the Discovery series program "Dinosaurs Unleashed," respected paleontologists and scientists will use advanced computer graphics technology and biomechanical research to peel away the skin, muscles, and bones of dinosaurs, uncovering how they survived in an extremely violent world. This is an authoritative guide to dinosaur anatomy, and the series "Dinosaurs Unleashed" will also reveal the latest findings in the field of science fiction imaging. - **Ancient Giants Revived: Terror Birds** Terror birds were the largest and most sinister birds on Earth. They had an 18-inch-long beak that could crush the skull of prey in one strike and swallow ancient giant rodents whole. Four million years ago, terror birds were the rulers of the continents, with strength comparable to wild wolves and saber-toothed tigers. (Premiere on July 5) - **Ancient Giants Revived: Mosasaurus** The Mosasaurus had a six-foot-long jaw and a bad temper. It fed on large sharks and plesiosaurs, and its upper jaw had an extra set of teeth, meaning once it bit something, the only possible escape was through the esophagus. (Premiere on July 6) - **Ancient Giants Revived: Spinosaurus** Spinosaurus was a carnivore, twice the size of a Tyrannosaurus rex. It had a six-foot-high ridge on its back, resembling a sail, along with a long crocodile-like skull and massive claws. One hundred million years ago, Spinosaurus may have been the king of the dinosaurs, but it was not without rivals, such as prehistoric crocodiles. (Premiere on July 12) - **Ancient Giants Revived: Bear Dogs** For five million years, bear dogs were the top predators in North America. These hybrid animals were large but agile and swift, using their keen senses and cunning intelligence to dominate all mammals in North America, including the formidable Entelodon that once roamed the continent. (Premiere on July 13) - **Ancient Giants Revived: Giganotosaurus** Giganotosaurus was a prehistoric mass-killing weapon, living 50 million years earlier than the Tyrannosaurus rex. Its forelimbs were the strongest in dinosaur history, and its teeth were as sharp as scissors. Its neural spines on the neck were tall, resembling a collar, allowing it to kill prey ten times its size. (Premiere on July 19) - **Ancient Giants Revived: Megalania** Megalania was a creature straight out of science fiction—a 18-foot-long lizard with sharp, fanged teeth and deadly venom. After the Tyrannosaurus rex, it was the largest reptilian predator. Legend has it that Megalania still survives in the Australian outback. (Premiere on July 20)