15 untold mysterious truths of prehistoric dinosaurs, Several of them subverted human cognition 1. Giant pterosaurs, larger than dinosaurs 2. Dinosaurs really existed like legendary dragons 3. Dinosaurs lost to crocodiles with carapace 4. Stegosaurus also had bipedal walking species 5. Terrible monsters with fangs in their mouths 6. Snakes and frogs that could eat dinosaurs 7. Dinosaurs with scissors hidden in their mouths 8. Hunters engulfed in quicksand 9.Cannibalistic dinosaurs 10.Burrowing dinosaurs that could dig holes 11.Dinosaurs disguised as trees 12.Dinosaurs that survived the mass extinction 13.Largest biped dinosaurs 14.Poisonous dinosaurs 15.Dinosaurs that dueled with horns

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In the late Cretaceous period, Hateg Island (where present-day Romania is located) was a separate piece of land. The main herbivores on the island are pony-sized pygmy sauropods, and the largest land animals are the giant pterosaurs, called the dragon pterosaurs, which are the top predators on the island.

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In Jurassic China, a family of dinosaurs called acrobatic ornithischia resembled real-life dragons. They are reptiles, but they have bat-like membranous wings and are covered with feathers! With these wings, they can't really fly, but they can definitely glide.

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In Brazil's Baulu Basin, in the late Cretaceous period, dinosaurs were almost completely defeated by their relative crocodiles. The top predators came from a group called the Bauru crocodile, which in many ways evolved in tandem with theropod suborder, and even a small crocodile with armadillo-like armor.

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Back in the Cretaceous, in Australia, there was a very strange stegosaurus, scientifically known as Garbina roeorum. First of all, it is very large, estimated to be 11 meters long. Second, its footprints — the only evidence we have — suggest that it can walk on two legs like a pangolin. It must be a very intimidating creature.

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At the end of the Mesozoic era, Madagascar was home to many strange and terrifying creatures. In addition to the huge cave-dwelling theropod dinosaurs and the armored sauropods, there was also a fish-eating dinosaur called The Norfleur Dragon, whose teeth were the strangest, huge and outward-growing.

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There were other terrible animals in Madagascar at the time, including the 8-meter-long giant python, the Madsunna snake, and the largest frog in history, the devil frog. It is not difficult to believe that both creatures fed on the dinosaurs on the island.

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Provencal Martenstooth is a herbivorous dinosaur, but I don't recommend putting your hand in its mouth, or any other part of yours. Its teeth are large, like scissors. With ridges on one side, their teeth are arranged in such a way that they grind their teeth more and more sharply as they chew.

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Fossils from 125 million years ago show that 6 Utahosaurus were trapped in a death trap of quicksand while preying on Malosaurus. One of them, who had been eaten away by quicksand in the midst of a sinking despair, was apparently a cub.

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Marjunosaurus, sometimes referred to as Marzongalosaurus, is the only known cannibalistic dinosaur because many of their bones have the same bite marks. Despite its enormous size, Ma Junlong's legs were very stout and short, and there were almost no arms—in fact, its hands were only 10 centimeters long.

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There is an as-unnamed Cretaceous thermopod dinosaur found in Niger and is thought to be cave dweller. It has a slender body, small arms height, and claws in the shape of a shovel, making it ideal for digging. Its discoverer, the famous paleontologist Paul Sereno, called it "the strangest dinosaur he'd ever found" and said it might be able to dive under the sand in search of underground prey.

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Birds are dinosaurs, so birds are likely to be the best source of our understanding of the behavior of extinct dinosaurs. Some artists have imagined that large theropods might mimic trees, like the modern forest plover and toad-mouthed plover. Seeing that a dead tree is actually a Tyrannosaurus rex must be very scary.

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There have been numerous reports of non-avian dinosaur fossils following the mass extinction at the end of the Cretaceous period, including carnivorous theropod dinosaurs and large platypus. Although there is no evidence of this, in the early Paleocene, there may even be several Tyrannosaurus rex still wandering, hunting the first giant mammals.

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In South Africa's Elliott Group, paleontologists discovered a giant prosauropod dinosaur that may have been as large as the famous Lepidoptera. However, it apparently walked on two legs, making it the largest bipedal animal ever built and the largest Triassic animal. Unfortunately, it has not yet been officially named.

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According to many paleontologists, there were poisonous dinosaurs. Especially the Chinese bird dragon. The Chinese bird dragon had peculiar teeth with grooves in the teeth, which was interpreted as a means of transporting venom. Fortunately, while it may be a professional bird killer, it doesn't have a chance to bite humans.

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As the most iconic dinosaur ever found in India, Katsuyaurus was an impressive theropod dinosaur and was a close relative of the aforementioned Marjunosaurus. It had a horn on its head that might have been used to hit its head—however, there were no bones on its skull that absorbed the vibrations. As a result, some speculate that in a fierce battle, they would slam their opponents' necks with their horns instead of hitting their heads, similar to giraffes.