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 (45 kph), scientists said on Thursday. This roughly matches the top speed achieved by Jamaican sprinter Usain Bolt, the world’s fastest human being. Two trackways located about 65 feet (20 meters) apart were discovered, one with seven footprints and the other with five. Each track—an impression of a three-toed foot with claws—measures around 12 inches (30 cm) long. They were made on the muddy surface of a lake plain in a …