Coelophysis (see-tp-FUS-iss)   Length: 10 feet Lived during: Late Triassic Found: North America Name means: Hollow form This oldest of all well known dinosaurs weighed only 100 pounds, had hollow bones, and ate meat.  It was also a fast runner, leading some experts to think Coelophysis was warm blooded.  Some adult skeletons have been found with babies inside them, which makes some scientists believe that the dinosaur gave live birth.  It makes others suspect it may actually have ben a cannibal. Lived at the same time as: Herrerasaurus, Plateosaurus, Procompsognathus  

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