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Tyrannosaurus (/ t ɪ ˌ r æ n ə ˈ s ɔː r ə s, t aɪ-/) [a] is a genus of large theropod dinosaur.The type species Tyrannosaurus rex (rex meaning 'king' in Latin), often shortened to T. rex or colloquially T-Rex, is one of the best represented theropods.
Montana's T. rex (also known as "Peck's rex", "Peckrex", "Rigby's rex" and Tyrannosaurus "imperator") is the nickname given to a fossil specimen found in Montana in 1997. [54] The discovery was made by Louis E. Tremblay on 4 July 1997 working under the supervision of J. Keith Rigby Jr. who led the excavation and bone preparation.
Lythronax (LYE-thro-nax) is a genus of tyrannosaurid dinosaur that lived in North America around 81.9-81.5 million years ago during the Late Cretaceous period.The only known specimen was discovered in Utah in the Wahweap Formation of the Grand Staircase–Escalante National Monument in 2009, and it consists of a partial skull and skeleton.
T. rex was fully grown at around 18-21 years. Perhaps the largest-known Tyrannosaurus, a specimen named Sue at the Field Museum in Chicago, is 40-1/2 feet (12.3 meters) long.
However, there is no direct evidence T-Rex and Triceratops ever fought. Furthermore, a lot of Triceratops only had traces indicating scavenging. Yet healed injuries on either a T-Rex or Triceratops would be a clear sign of a fight. [18] A juvenile T-Rex has a bite force of 5,641 newtons compared to the 35,000 newtons of a full-grown adult.
Three North Dakota schoolboys made a larger-than-life discovery when they stumbled across a T rex skeleton during a hike.. Two young brothers and their cousin were wandering through a fossil-rich ...
On August 12, 1990, Susan Hendrickson -- a fossil hunter -- discovered three huge bones protruding out of a cliff near Faith, South Dakota. Those burned turned out to be part of the largest ever T ...
Marsh, who examined the specimen in 1881, thought that this small skeleton in the Compsognathus belly was an embryo, but in 1903, Franz Nopcsa concluded that it was a lizard. [60] Ostrom identified the remains as belonging to a lizard of the genus Bavarisaurus , [ 61 ] which he concluded was a fast and agile runner owing to its long tail and ...