It almost is not fair. Carnivorous dinosaurs were armed with menacing teeth inside muscular jaws, wielded dangerous claws on their hands and feet, and boasted keen vision and sense of smell. And, as new research confirms, some were pretty fast, too.
Two trackways of Cretaceous Period fossilized footprints from about 120 million years ago discovered in northern Spain's La Rioja region show that the medium-sized meat-eating dinosaur species that made them could run at about 28 miles per hour , scientists said on Thursday.
Speed only added to the arsenal of meat-eating dinosaurs like the species that left the footprints in Spain. The researchers believe the trackways were made by two different individuals of the same species. They suspect it was from one of two theropod families: the spinosaurs, many of which were fish-eaters, or carcharodontosaurs, known for shark-like teeth. The individuals were about 13-16 feet long and 7 feet tall, weighing 440-660 pounds .
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