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Dinosaurs are the extinct animals that inhabited our planet 225-65 million years ago (during mesozoans period).

In ancient times people considered these bones to be the remains of the heroes of the Trojan War. During medieval times and till the 19th century these bones were considered to be the remains of giants that were mentioned in the Bible and that died during the Deluge.

According to the recent investigations from the USA Universities, dinosaurs the remains of which palaeontologists find died because of suffocation.

Dinosaurs became extinct in the end of Cretaceous period near 65 million years ago. There is no one point of view on the reason for their extinction, scientists are not even sure either they died out gradually or suddenly. This point is the point of discussions nowadays.

These animals are rather popular all over the world till nowadays despite the fact they are extinct. Nevertheless these animals are popular characters of cartoons, myths, legends and films that become rather popular.

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Facts about extinction

All theories are good and explain several factors that could influence the extinction of dinosaurs. But there is no theory that could fully explain the whole complex of phenomena connected with the extinction of dinosaurs and other species in the end of Cretaceous period.

Speaking about the dinosaurs' extinction it is necessary to mention several factors.

The extinction was fast only according to geological measures while the majority of palaeontologists consider that it took not less than one hundred thousand years.

In general it is not possible to speak about the fast extinction of dinosaurs. There is the constant change of species and the appearance of new ones in any group of animals. These processes take place simultaneously and thanks to the similar number in those who die and those who appear, the group of animals exists. And in the case of dinosaurs, there were simply no animals that substituted the new ones. And in such way they died out.

But such point of view is not supported by all new experts. That is why there is the number of problems that all theories have and all these problems are connected with the fact that scientists try to explain the reason for extinction forgetting about other facts.