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Edmontosaurus Dinosaur Bone, from Hell Creek, South Dakota, U.S.A. (No.145)

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Edmontosaurus Dinosaur Bone, from Hell Creek, South Dakota, U.S.A. (No.145)Edmontosaurus Dinosaur Bone, from Hell Creek, South Dakota, U.S.A.
Cretaceous Period, 73-66 Million Years

Measurements Approx.
Height - 2.3 cm
Width - 5.9 cm
Length - 6.8 cm



Edmontosaurus is a genus of hadrosaurid (duck-billed) dinosaur.


The first fossils named Edmontosaurus were discovered in southern Alberta, Canada (named after Edmonton, the capital city)


  

Hadrosaurs ("duck billed’ dinosaur) were a group of herbivorous dinosaurs from the Cretaceous period.  Descended from Iguanodon-like ancestors, these dinosaurs as the name suggests had a duck-bill like mouth, which varied in shape depending on their diet, they had multiple rows of cheek teeth, which were used as a grinding surface. 


Some had crests on top of their heads, this is much discussed as to its purpose. Its use as a social function being widely accepted, possibly in courtship or communication such as warnings and through some fossil finds it thought that Hadrosaurs had good eye sight and hearing. With a lack of obvious defences it’s generally considered to be living in large herds, running at speed from large carnivores, such as T-Rex. 







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