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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.
Among the dinosaurs on the Ica stones is for instance a Tyrannosaurus rex, though shown nearly upright with its tail dragging behind it on the ground. This depiction is in-line with how T. rex was depicted in the 1960s (when the stones were "found") but does not reflect current scientific understanding. [3]
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.
The species roamed North America for about 1.2 million to 3.6 million years, meaning the T. rex population density was small at any one moment. Study: 2.5 billion T. rex roamed Earth, but not all ...
A new modeling study from researchers at UC Berkeley estimates the total number of T. rex to ever roam Earth at 2.5 billion. The post Study Estimates 2.5 Billion T. Rex Roamed Earth Over Time ...
This sudden change in growth rate may indicate physical maturity, a hypothesis that is supported by the discovery of medullary tissue in the femur of an 18-year-old T. rex from Montana (MOR 1125, also known as "B-rex"). [51] Medullary tissue is found only in female birds during ovulation, indicating that "B-rex" was of reproductive age. [52]
If an earlier civilization existed on Earth millions of years ago, we might have trouble finding evidence of it -- but that doesn't mean it didn't exist.
Maraapunisaurus, one of the largest animals to walk the earth. Bruhathkayosaurus, potentially the largest terrestrial animal to ever exist. There were larger dinosaurs, but knowledge of them is based entirely on a small number of fragmentary fossils.