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The first ever evidence of a dinosaur that swam, lived, and chased underwater was discovered in the now deserted desert of & # 39; a Sahara desert.

But 100 million years ago this region would have been a lush oasis, interspersed with rivers and waterways with life.

And beneath the surface of the hatch, seated above the high food chain, was a fearful horrible dinosaur.

The river monster – called Spinosaurus aegyptiacus – is driven by the water with a fin-like tail and finely smooth prairie with six-inch long conical teeth.

A fossil tail of a youth of a kind, belonging to the group of derpod, the same as the T-rex, was found in present-day Morocco.

Adults are known to travel up to 50ft long and weigh up to 20 tonnes, but this specimen still had to reach its full size, measure 35ft from snout to tail and weigh about four tonnes.

Fully grown individuals did not have natural predators, but researchers say that youth risk may have a risk of giant fish and enormous prehistoric crocodiles.

The researchers who led the project and discovered the fossil considered this hostile marine world & # 39; the river of & # 39; a death & # 39 ;.

A 3D view of Spinosaurus in search of a group of sawfish. Spinosaurus powered by water with a fin-like tail and finely smoothed beak with six-inch long conical teeth

Pictured, an impression of an artist of two Spinosaurus hunting on National Geographic sawfish. Adults are known to travel up to 50ft long and weigh up to 20 tonnes, but this specimen still had to reach its full size, measure 35ft from snout to tail and weigh about four tonnes

Pictured, an impression of an artist of two Spinosaurus hunting on National Geographic sawfish. Adults are known to travel up to 50ft long and weigh up to 20 tonnes, but this specimen still had to reach its full size, measure 35ft from snout to tail and weigh about four tonnes

Pictured, part of a tail discovered in present-day Morocco. The newly discovered Spinosaurus aegyptiacus tail shows that it was well adapted to an aquatic lifestyle

Pictured, part of a tail discovered in present-day Morocco. The newly discovered Spinosaurus aegyptiacus tail shows that it was well adapted to an aquatic lifestyle

How the fearful Spinosaurus chased underwater

Spinosaurus could grow up to 50ft long and weigh up to 20t.

The beasts were so large and fearful that the adults of the species had no natural predators.

It had several adjustments that allowed it to survive and hunt underwater.

The nostrils were far back on & # 39; s head, allowing him to breathe with only a small portion of & # 39; a head that stuck above the water level.

The bones were extremely tight, similar to penguins, allowing it to carefully control its position in the water, ensuring a careful balance between buoyancy and immersion.

Big, flat feet that were likely to be webbed allowed it to sweep across the soft land around the river banks, while the movement in water was equal to crocodiles.

The flat tail moved laterally and pushed the dinosaur forward.

It was a therepod, the same group of dinosaurs that included dinosaurs.

It's the only dinosaur known to swim and have huge jaws filled with six-inch long razor-sharp teeth.

The teeth were resilient and not so barky, which were well adapted to adhere to the smooth bait that chased it.

The snout is more similar to that of crocodiles than to other predatory dinosaurs. These houses sensory structures capable of capturing the waves produced by swimming debris.

This organ functioned like a sonar – allowing the animal to hunt even in muddy waters.

By the time of Spinosaurus, several other reptile groups had dominated the water, including ichthyosaurs, but not dinosaurs.

The newly discovered Spinosaurus aegyptiacus tail shows that it was well adapted to an aquatic lifestyle.

Two foot long stripes on the main vertebrae extend the tail into a paddle-like shape.

Dr David Unwin, Reader in Palaeobiology at & # 39; the University of Leicester, who was involved in the research, said: & # 39; The fin-like tail of & # 39; the Spinosaurus is a game-changing discovery for us that & # 39; s our understanding of & # 39; a dinosaur lived and hunted – it was actually a "river monster".

& # 39; Like the tail, many other features of this dinosaur, such as the high position of & # 39; Nostrils, heavy bones, short legs, and paddle-like feet on a life exist in the water rather than on land.

& # 39; Not only did dinosaurs dominate the land and took them as birds in & # 39; e air, they even went back into the water and became the top predators there as well. & # 39;

The study, published today in the journal Nature, concludes that this animal was a truly water-conscious, stationary dino that probably spent most of its life underwater.

National Geographic explorer and University of Detroit Mercy paleontologist Dr Nizar Ibrahim led the investigation.

His team included Dr Unwin and Professor David Martill of & # 39; the University of Portsmouth.

Academics began digging a skeleton of Spinosaurus in southern Morocco in 2015 and made the historic discovery of its nearly complete and well-preserved tail in 2018.

Tails of other therapy methods, which existed on land, had a stiff tapered tail.

But analysis of vertebrae found in Morocco revealed long spines that supported a large, highly flexible, fin-like tail similar in shape to that of a crested newt.

Spinosaurus reconstruction in life: long narrow jaws with conical teeth, and a unique tail for aquatic locomotives

Spinosaurus reconstruction in life: long narrow jaws with conical teeth, and a unique tail for aquatic locomotives

Top: Reconstruction of the tail skeleton of Spinosaurus (missing bones shown in white). Center: cut through the tail with changes in vertebrae, tail volume, and arrangement of large muscles. Soil: the new - and surprising - look of Spinosaurus (black, soft parts / body design; red, bones collected in 2008 by a local fossil collector; green, bones from recent scientific excavations; yellow, bone fragments collected in the debris around & # 39 ; the main excavation area)

Top: Reconstruction of the tail skeleton of Spinosaurus (missing bones shown in white). Center: cut through the tail with changes in vertebrae, tail volume, and arrangement of large muscles. Soil: the new – and surprising – look of Spinosaurus (black, soft parts / body design; red, bones collected in 2008 by a local fossil collector; green, bones from recent scientific excavations; yellow, bone fragments collected in the debris around & # 39 ; the main excavation area)

The site in the Sahara where the fossil was found is a hotbed for fossil hunters, with other finds including sawfish, crocodiles, flying reptiles and dinosaurs in country houses.

Professor Martill said, & # 39; This fossil site has been incredible. This is the first Spinosaurus skeleton found in over a hundred years. It is also one of the few associated dinosaur skeletons that have ever been found in & # 39; e Kem Kem rocks.

& # 39; Scientists have always relied on Spinosaurus, to apply new scientific techniques to this animal so far were not possible, & # 39; the original material in & # 39; e World War II was destroyed. Now we have a new baby to play with.

& # 39; Every time we look at this dinosaur, we discover something fascinating about it. Discovering the tail was such a great gift. We had no idea that the tail would be so different from other dinosaur tails.

& # 39; However, one thing that still puzzles me is the reason that only Spinosaurus in & # 39; dinosaurs worth aquatic. Why aren't there aquatic iguanodons, or stegosaurians. & # 39;

While it remains a mystery why only one dinosaur floods the water, the discovery revealed a long-held belief that dinosaurs never swam.

Dr Ibrahim said: & # 39; This discovery is the nail in & # 39; e box for the idea that non-avian dinosaurs never invade the aquatic realm.

& # 39; This dinosaur was actively preying on & # 39; e water type, and did not just wait in shallow waters for fish to swim. It probably spent most of his life in the water. & # 39;

The September 2018 team that discovered the tail of the only associated Spinosaurus skeleton in existence. Left to right, and from top to bottom: Simone Maganuco, Ayoub Amane, M & # 39; Barek Fouadassi, Nizar Ibrahim, Samir Zouhri, Cristiano Dal Sasso, Gabriele Bindellini, Marco Auditore, Matteo Fabbri, Diego Mattarelli, Hamid Azroal, Mhamed Azroal

The September 2018 team that discovered the tail of the only associated Spinosaurus skeleton in existence. Left to right, and from top to bottom: Simone Maganuco, Ayoub Amane, M & # 39; Barek Fouadassi, Nizar Ibrahim, Samir Zouhri, Cristiano Dal Sasso, Gabriele Bindellini, Marco Auditore, Matteo Fabbri, Diego Mattarelli, Hamid Azroal, Mhamed Azroal

A view of the Kem Kem region, the Sahara desert (southeastern Morocco), from the Spinosaurus excavation site

A view of the Kem Kem region, the Sahara desert (southeastern Morocco), from the Spinosaurus excavation site

The site in the Sahara where the fossil was found (pictured) is a hotbed for fossil hunters, with other finds including sawfish, crocodiles, flying reptiles and land-living dinosaurs

The site in the Sahara where the fossil was found (pictured) is a hotbed for fossil hunters, with other finds including sawfish, crocodiles, flying reptiles and land-living dinosaurs

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