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Parasaurolophus walkeri, left lower jaw (juvenile) hadrosaur PteranodonParasaurolophus was a long crested, duck billed (hadrosaur) dinosaur. Its extremely long, backwards leaning, hollow, bony crest was as bigger than the rest of its skull and may have been used to produce a low frequency, foghorn like sound, enhance its sense of smell, and or used in courtship displays. The Parasaurolophus' nostrils (at the end of its snout) went up through the crest and back down it, forming four tubes. The crest was up to 6 feet (1. 8
The Camarasaurus sauropod dinosaur known as Lyle is the largest discovered to date
A complete tooth with root could be over 12 inches long
There are vertical and horizontal hangers on the back
Unlike many other oviraptorids
A definitive explanation for their mass extinction is yet to be agreed upon
Jefferson thought they were the claws of a giant cat
Mene rhombea had a laterally compressed body
slate was quarried for hundreds of years and is still quarried today up to 38 feet in depth
Dragonflies spend the larval portion of their lives in freshwater
but not the scales of the cone
New Zealand
with full adulthood being reached at 36 months