Dinosaur Teeth Reveal Large Migrations

An analysis of fossilized teeth from dinosaurs in the western United States has provided the first concrete evidence that sauropods undertook seasonal migrations in search of food.Scientists have often assumed that dinosaurs did, in fact, migrate.  However, it is difficult to determine from fossils even what dinosaurs looked like, let alone infer their behavior.But Henry Fricke, head of geology at Colorado College in Colorado Springs, and his colleagues seem to have found solid evidence that sauropod dinosaurs moved hundreds of miles each year. “In a theoretical sense, it’s not hugely surprising. They are huge they would probably have eaten themselves out of house and home if they stayed in one place,” Fricke said. Fricke and his colleagues analyzed fossil from 32 teeth that belonged to sauropods of the genus Camarasaurus.  The teeth were collected at Thermopolis in Wyoming and Dinosaur National Monument in Utah, and date from the late Jurassic period (160 million to 145 million years ago).This finding has helped many scientists to know how dinosaurs survived in the past.