Tell about Tyrannosaurus ?

. It is considered to be one of the largest carnivorous dinosaurs to have ever walked the Earth and its very name means “tyrant lizard”. It was first discovered in 1902 by Barnum Brown.

Tyrannosaurus is believed to be one of the most aggressive and fearsome dinosaurs to walk the planet. It stood approximately 20 feet tall, was about 40 feet long from head to tail and weighed approximately 7 tons

A recent redescription of the skull of Tarbosaurus bataar has shown that it was much narrower than that of Tyrannosaurus rex and that during a bite, the distribution of stress in the skull would have been very different, closer to that of Alioramus, another Asian tyrannosaur.

It is believed this dinosaur feasted on large herbivore dinosaurs such as triceratops and brontosaurus dinosaurs. The T- Rex—as it is commonly referred to—had an deadly bite. It had a minimum bite force of at least 12,000 pounds and could eat over 500 pounds of meat in one bite.

The T Rex is not only known for its size and aggressive nature, but is also known for its very tiny hands.

Scientists don’t currently know how the Tyrannosaurus used its tiny arms or what purposes it served, but there are some theories floating around.

. Another theory stipulates that these dinosaurs used their arms to tightly grab squirming prey so they could bite them. Considering the strength of these appendages, then this theory seems to be one of the most plausible.

A related cladistic analysis found that Alioramus, not Tyrannosaurus, was the sister taxon of Tarbosaurus, which, if true, would suggest that Tarbosaurus and Tyrannosaurus should remain separate. The discovery and description of Qianzhousaurus in 2014, would disprove this and reveal that Alioramus belonged to the clade Alioramini.

At the time of this writing, an interesting fact is that only about 30 Tyrannosaurus skeletons have been found around the world.

Tyrannosaurus rex is by far the most popular dinosaur, having spawned a huge number of books, movies, TV shows, and video games.

The discovery of the tyrannosaurid Lythronax further indicates that Tarbosaurus and Tyrannosaurus are closely related, forming a clade with fellow Asian tyrannosaurid Zhuchengtyrannus, with Lythronax being their sister taxon. A further study from 2016 by Steve Brusatte, Thomas Carr et al., also indicates Tyrannosaurus may have been an immigrant from Asia, as well as a possible descendant of Tarbosaurus.

Most people assume that the North American Tyrannosaurus rex—at 40 feet from head to tail and seven to nine tons—was the biggest carnivorous dinosaur that ever lived. T. rex, however, was equaled or outclassed by not one but two dinosaurs

South American Giganotosaurus, which weighed about nine tons, and the northern African Spinosaurus, which tipped the scales at 10 tons.

The study further indicates the possibility that Tyrannosaurus may have driven other tyrannosaurids that were native to North America extinct through competition. Other finds in 2006 indicate giant tyrannosaurs may have been present in North America as early as 75 million years ago. Whether or not this specimen belongs to Tyrannosaurus rex, a new species of Tyrannosaurus, or a new genus entirely is still unknown.

The name Tyrannosaurus rex means "king of the tyrant lizards": "tyranno" means tyrant in Greek; "saurus" means lizard in Greek, and "rex" means "king" in Latin. In 1905, Henry Fairfield Osborn, president of the American Museum of Natural History at the time, named Tyrannosaurus rex.

Other tyrannosaurid fossils found in the same formations as Tyrannosaurus rex were originally classified as separate taxa, including Aublysodon and Albertosaurus megagracilis, the latter being named Dinotyrannus megagracilis in 1995. These fossils are now universally considered to belong to juvenile Tyrannosaurus rex. A small but nearly complete skull from Montana, 60 centimeters (2.0 ft) long, may be an exception

This skull was originally classified as a species of Gorgosaurus (G. lancensis) by Charles W. Gilmore in 1946,[65] but was later referred to a new genus, Nanotyrannus.[66] Opinions remain divided on the validity of N. lancensis. Many paleontologists consider the skull to belong to a juvenile Tyrannosaurus rex.

Its two-fingered forearms were puny, making it unlikely that T. rex could use them to kill or even get a meal to its mouth

There are minor differences between the two species, including the higher number of teeth in N. lancensis, which lead some scientists to recommend keeping the two genera separate until further research or discoveries clarify the situation.

The king of dinosaurs needed thick neck muscles to hold up its large skull and power its forceful bite.

Neck and arms muscles compete for space in the shoulder, and it appears that the neck muscles edged out the arm muscles in T. rex's case