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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.

Falcarius utahensis

Falcarius utahensis is the discovered in 2005 type of dinosaurs that was the missed point between the evolution of dinosaurs and birds.

The found reptiles lived about 125 million years ago. These were not the biggest dinosaurs as the length of their body was about 4 meters and their height was about 1.5 meters. They used two legs for walking and the plumage that was long and curved decorated their legs. Their legs had the curved nails.

Falcarius utahensis could eat both animals and plants. Scientists think that the appearance of this specie of dinosaurs happened during the time of a great number of good plants appearance.

Falcarius utahensis remains were found in the Utah state in the USA during the archaeological researches. In the result of such expedition big burial place of dinosaurs was discovered. And according to scientists this burial place was the result of the death of a great number of dinosaurs' that happened simultaneously. But till nowadays scientists can't explain the reason for their death that happened at that period.

According to one of theories these dinosaurs lived in families and even in big groups. And they died being poisoned by the water. And the reason for the mass poisoning could be the natural gas, for example.

Anyway this discovery makes the great step forward in dinosaur's investigations.