Pterosaurs are the flying lizards living on the planet about 250 million years ago by right could be considered as owners of the sky. The huge asteroid which suddenly fell to the Ground destroyed the empire of ancient monsters, and the accidents which survived later slowly died of hunger and cold. But unless it is not interesting to learn how the world in which dragons survived would look.
In some fantastic movies ("Butterfly Effect", "Also burst a thunder") the situation at which the existing reality changes is well described if to change at least one insignificant detail in the past. Pterosaurs were not only a powerful link in a food chain of all planet, but also occupied a considerable niche in evolutionary development of many types.
Considering that a basis of existence of any living organism is livelihood and survival, it is possible to assume, as winged lizards were not an exception. The flying reptiles, presumably in structure teeth, were predators and ate small small animals – the first mammals, less large lizards, fish, but did not disdain also drop.
If they did not die out, at mammals, including the first primacies, and subsequently at the person, on free existence and development of chances would be much less, and in certain cases they in general would come down to zero. It is quite possible that pterodactyls, dimorfodona and ramforinkh would exterminate at the roots the first primacies – pleziodapis which sizes were no more squirrel. Possibly, mammals would learn to adapt by Wednesday in which the sky teems with lizards of various size, but they would look absolutely differently. The protective color, defensive elements and other devices in appearance would change a habitual type of many animals. If to assume that the mankind could be born and survive in such conditions and reach in the level of development a present step of a civilization, then the become shallow dragons, most likely, would choose garbage cans and city dumps, and would live in parks, on roofs of houses and office buildings. Not absolutely romantic prospect, but is that niche which is occupied by city pigeons, crows, vagrant cats and dogs. A part of pterosaurs would be cultivated. Selectors would remove a number of various breeds of lizards, exhibitions and competitions to their participation would be held. And the manufacturing plants of forages for pets would have an opportunity to release the balanced forages for large and small breeds of pterosaurs.