Since 1820, the names of the dinosaurs were invented by the paleontologists .Each time that one discovers a new dinosaur, it is described in detail in a scientific review .Scientists choose a name which was never given before and which gives indications on the way in which one found it or on the site where it was discovered.

Some dinosaurs probably swallowed stones were used to crush the hard sheets , the brushwood and the young growths, in the stomach.

The molars of dinosaur known is that of Tyrannosaurus rex .This tooth could reach 30 cm top .

Nobody cannot say which dinosaur was fastest .But, some dinosaurs, like Struthiomimus and Galliminus were according to specialists' to run to nearly 40 km/h.

Many indices prove that certain species lived in herds .Thousands of bones of the same species were found together. These bones were probably piled up when the herds were surprised by brutal floods.

It is almost impossible to determine exactly the average lifespan of a dinosaur .Scientists study the growth of the bones of some dinosaurs, as is made it to date the trees by studying their rings .They think that Massosopondyle , a small dinosaur, lived between 30 and 70 years , a little like the lifespan of human.

The Seismosaure is undoubtedly one of the most imposing dinosaurs which ever existed .Pieces of its skeleton are still to extract from the ground in the United States .This monster was to make 36,5 meters length probably weighed 51 tons is the weight of 9 African elephants .

In some measurement that depended obviously its appetite! However, while addmettant that it was famished, the size of cranium and the belly lets suppose that adult T-rex could consume up to 120 kg of meat per meal (the weight of two average adults or six children)! Only one meal was enough for him to hold during several days, until the following meal.

Yes, some dinosaurs ate eggs of other animals: it was a meal very nutritive .The Oviraptor , whose name means " egg robber ", had two kinds of sharp-edged mandibles .He undoubtedly made use of it to bore the egg shells, as do it today the snakes.

The word reptile comes from Latin repere who wants to say to crawl or to trail Les first people which used this word to describe animals as the snakes could not imagine that the dinosaurs had existed .We know that the dinosaurs were reptiles, but it is not thought that none them ever crawled.

This animal coming from Argentina dispute the place of honor of dinosaur oldest .They are Herrerasaure and Eoraptor , both of the carnivores going on leus legs postpones .They lived approximately 225 million years ago in the medium of Sorted Avec 3 meters length , Herrerasaure was the largest .The Eoraptor measured 1 meter and was discovered only in 1992 .The search for fossils continues and one will perhaps find dinosaurs even older.