Top 10 Biggest Dinosaurs Ever

Top 10 Biggest Dinosaurs Ever

Continuing our range of top 10, today we are going to call your attention by this topic; top 10 biggest dinosaurs.  Dinosaurs are a group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of evolution of dinosaurs remain mystery for scientists.

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Smallest species of a dinosaur

The smallest species of a dinosaurs

In the Canadian province Albert the North American scientists found remains of an unusual dinosaur. It is the smallest species of dinosaurs under the name Albertadromeus Syntarsus. The dinosaur is obliged by the name to area in which he was found. Full results of research were published in the scientific magazine “Journal of Vertebrate Paleontology”. New species of the herbivorous dinosaur found in Canada, scientists could identify thanking first of all to the found bones of his hinder leg. After studying of the found remains, scientists could define that the total length of a dinosaur didn’t exceed 1,60 meters, and weight – 15 kilograms. According to scientists, it had to be extremely bright dinosaur and smallest of all herbivorous dinosaurs known today. Experts consider that in reality there could be a set of species of small dinosaurs, both herbivorous, and predatory, however they had less chances to remain till today unlike dinosaurs of bigger sizes.

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Crater Chicxulub – the reason of disappearance of the dinosaurs

There are some theories regarding the disappearance of the dinosaurs, and one of these theories surrounds the 110 mile-wide crater Chicxulub in Mexico. The scientists think that the asteroid was the culprit for dinosaurs’ disappearance, which had crashed into Earth. But the group of scientists from USA is offering a new theory, which proves that the culprit was not a crater Chicxulub, but a speeding comet. The American scientist suggests the evidences from the crater, which are proving the impact beyond the asteroid. According to results of iridium and osmium analyzing, the scientists’ group decided that the collision left less debris, that the scientists had calculated later. This fact allows to believe that the impact occurred by a relative smaller object than previously thought. As the scientists assume, the comets originate outside the solar system. The comets follow the elliptical orbits, which pass the Sun. If the impact at Chicxulub was caused by the comet, it would set a shockwave, which would trigger huge tsunamis and volcanic eruption. Also, the impact would send a cloud of heated dust in the atmosphere, which would block the Sun. These events, perhaps, were the end of the dinosaurs rule on the Earth.

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Paleontologists Found Giant Feathered Dinosaurs

A newly described relative of Tyrannosaurus rex is the largest known feathered anima. The feathered meat-eating dinosaur lived about 125 million years ago. This group of dinosaurs is known as the Tyrannosauroids. Tyrannosaurus rex and its gigantic cousins lived until around 65 million years ago. Xing Xu and colleagues from the Chinese Academy of Sciences in Beijing have now described three specimens of Yutyrannus, which represents an early example of the Tyrannosauroid form.

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Study Show Mammals Thrived Despite Dinosaurs

New study which was published in the journal Nature indicates that at least one group of ancient mammals was already expanding 20 million years before the dinosaurs were wiped from the Earth. Analysis of ancient mammal teeth indicates they were able to take off not because dinosaur die-off made way for them, but because they discovered a new food source that others weren’t consuming. Some of the world’s earliest mammals were the multituberculates, a group of small rodentlike animals that first emerged on Earth about 165 million years ago.

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Scientists have Named Two New Horned Dinosaur Species

In a new study, scientists have named two new horned dinosaur species based on fossils collected from Alberta, Canada. The new species, Unescopceratops koppelhusae and Gryphoceratops morrisoni, are from the Leptoceratopsidae family of horned dinosaurs. The herbivores lived during the Late Cretaceous period between 75-83 million years ago. According to Michael Ryan, lead author of the study from The Cleveland Museum of Natural History these dinosaurs fill important gaps in the evolutionary history of small-bodied horned dinosaurs that lack the large horns and frills of relatives like Triceratops from North America.

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