What are the plants giant dinosaurs eating what they could not find enough food in the arid western U.S.? Set off. An analysis of the fossilized teeth adds further evidence that long-necked dinosaurs called sauropods - the largest creatures on earth - went on road trips to meet their huge appetites.
Scientists have long theorized that the sauropod gathered valuable resources in drought-preserved pieces and long legs, which were "perfect for the machines in motion," and gave them over long distances, said Matthew paleobiologist Bonnan of Western Illinois University.
The latest research is the best proof but at least one of the sauropods, "took to the hills in search of food were hard times, plains," says paleontologist Kristi Curry Rogers, Macalester College in Minnesota.
The new work, published online Wednesday in the journal Nature, led by geologist Henry Fricke Colorado College.
The researchers analyzed 32 teeth of sauropods collected Wyoming and Utah. Teeth has become a huge plant-eaters surrounding a semi-arid basin of the American West during the late Jurassic period about 150 million years ago.
Most sauropods weighed 100 tons and was 120 feet long. The present study was small - about 60 feet long and weighing 25 tons.
Scientists can get a glimpse of the water source of the dinosaurs by comparing the oxygen stored in the enamel of the teeth found in ancient sediments.
Chemical analysis revealed differences in the teeth and pelvis when the dinosaurs were buried, which means you must have wandered hundreds of miles of flood plains in the highlands of water and food.
Fricke said, the movement seems to be tied to the seasons. Sauropods left the pool during the summer - trek that lasted about five months - and is back in the winter.
At times lush, sauropods would have celebrated in a variety of plants, including ferns, horsetails, conifers, and mosses, said John Foster, director of the Museum of Western Colorado, who had not participated in the investigation.
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Posted by Dinosaurs World at 10:20 PM