Videos About Nature

National geographic - T Rex (Tyrannosaurus Rex) - New Documentary HD 2018 Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex (rex meaning "king" in Latin), is one of the most well-represented of the large theropods. Tyrannosaurus lived throughout what is now western North America, on what was then an island continent known as Laramidia. Tyrannosaurus had a much wider range than other tyrannosaurids. Fossils are found in a variety of rock formations dating to the Maastrichtian age of the upper Cretaceous Period, 68 to 66 million years ago. It was the last known member of the tyrannosaurids, and among the last non-avian dinosaurs to exist before the Cretaceous–Paleogene extinction. Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to its large and powerful hind limbs, Tyrannosaurus fore limbs were short but unusually powerful for their size and had two clawed digits. The most complete specimen measures up to 12.3 m (40 ft) in length, up to 3.66 meters (12 ft) tall at the hips, and according to most modern estimates 8.4 metric tons (9.3 short tons) to 14 metric tons (15.4 short tons) in weight. Although other theropods rivaled or exceeded Tyrannosaurus rex in size, it is still among the largest known land predators and is estimated to have exerted the largest bite force among all terrestrial animals. By far the largest carnivore in its environment, Tyrannosaurus rex was most likely an apex predator, preying upon hadrosaurs, armoured herbivores like ceratopsians and ankylosaurs, and possibly sauropods. Some experts have suggested the dinosaur was primarily a scavenger. The question of whether Tyrannosaurus was an apex predator or a pure scavenger was among the longest ongoing debates in paleontology. It is accepted now that Tyrannosaurus rex acted as a predator, and opportunistically scavenged as modern mammalian and avian predators do. More than 50 specimens of Tyrannosaurus rex have been identified, some of which are nearly complete skeletons. Soft tissue and proteins have been reported in at least one of these specimens. The abundance of fossil material has allowed significant research into many aspects of its biology, including its life history and biomechanics. The feeding habits, physiology and potential speed of Tyrannosaurus rex are a few subjects of debate. Its taxonomy is also controversial, as some scientists consider Tarbosaurus bataar from Asia to be a second Tyrannosaurus species while others maintain Tarbosaurus is a separate genus. Several other genera of North American tyrannosaurids have also been synonymized with Tyrannosaurus. As the archetypal theropod, Tyrannosaurus is one of the best-known dinosaurs since the 20th century, and has been featured in film, advertising, and postal stamps, as well as many other types of media.

National Geographic - Flying Sky Monsters Pterosaur - New Documentary 2018 National Geographic: Flying Sky Monsters Pterosaur, the winged reptile, is one of nature's great success stories. Often referred to as pterodactyls, pterosaurs survived as long as the dinosaurs but they are not dinosaurs. They spread across the globe, soaring or skimming over oceans, inland seas, lakes and rivers, where they became commanding predators of fish and other creatures. They diversified like mad and ranged from the size of a sparrow to that of an F-16 jet-fighter. But pterosaurs have long proved a mystery to scientists, ever since the first fossil was discovered in Germany in 1784. How did they catch and kill their prey? Did they lay eggs or give birth to live young? Did they walk on two or four legs? What was the function of the bizarre crests that made some of them look like revellers in a kind of Jurassic Mardi Gras? Perhaps most challenging of all, how did they fly? Their wing design and flight control were unlike anything that has been seen before. In Flying Sky Monsters, animation and CGI helps us look at these fascinating creatures in more detail. What did they eat, how did they live, why did they vanish? We travel to Inner Mongolia to both search for pterosaur fossils and to see if a team of palaeontologists, scientists, aerialists and engineers can reconstruct a pterosaur in order to establish how an animal that large flew.

National Geographic Documentary - Prehistoric Predators - Wildlife Animals Prehistoric Predators was a 2007 National Geographic Channel program based on different predators that lived in the past, including Smilodon and Megalodon. The series investigated how such beasts hunted and fought other creatures, and what drove them to extinction. The program's investigative style was somewhat followed by the recent Discovery Channel documentary, Monsters Resurrected. Prehistoric times contained some of the largest and most terrifying predators to have ever roamed the earth. Some relied on raw strength and speed while others utilized the element of surprise to satisfy their hunger. Despite these two dissimilar styles of hunting, each of these predators shared a common characteristic: they reigned as one of the top hunters of their time. These amazing prehistoric predators had their own particular ways of hunting that kept them at the top of the food chain.

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