A new study by Yale undergraduate Chase Doran Brownstein describes two dinosaurs that once roamed the eastern United States from fossils housed at the Yale Peabody Museum of Natural History: an herbivorous hadrosaur (depicted in the silhouette) and a tyrannosaur.
A new study by Yale undergraduate Chase Doran Brownstein describes two dinosaurs that once roamed the eastern United States from fossils housed at the Yale Peabody Museum of Natural History: an herbivorous hadrosaur (depicted in the silhouette) and a tyrannosaur. Tyrannosaurus rex , the fearsome predator that once roamed what is now western North America, appears to have had an East Coast cousin. A new study by Yale undergraduate Chase Doran Brownstein describes two dinosaurs that inhabited Appalachia - a once isolated land mass that today composes much of the eastern United States - about 85 million years ago: an herbivorous duck-billed hadrosaur and a carnivorous tyrannosaur. The findings were published Aug. 25 in the journal Royal Society Open Science. The two dinosaurs, which Brownstein described from specimens housed at Yale's Peabody Museum of Natural History, help fill a major gap in the North American fossil record from the Late Cretaceous and provide evidence that dinosaurs in the eastern portion of the continent evolved distinctly from their counterparts in western North America and Asia, Brownstein said. " These specimens illuminate certain mysteries in the fossil record of eastern North America and help us better understand how geographic isolation- large water bodies separated Appalachia from other landmasses - affected the evolution of dinosaurs," said Brownstein, who is entering his junior year at Yale College.
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