Dinosaurs is not the first decade, become the subject of attention not only ordinary people, but also scholars.They are trying to learn about these mysterious creatures everything from how on earth did this kind of ending to why dinosaurs became extinct.Although it is the last topic concerned the majority of scientists who each year develop all new versions.
Dinosaurs became extinct from extraterrestrial invasion
No, it absolutely does not concern the invasion of aliens.In this case, the main reason for the total extinction of the dinosaurs indicates activity of the heavenly bodies.It is believed that the dinosaurs became extinct because of one of the following factors: the fall of a large asteroid, multiple "bombing" asteroids Earth's surface, Earth's collision with a comet and increase the level of radiation as a result of a supernova explosion or other factors of a similar nature.
Geological studies have repeatedly confirmed the fact that the Earth's surface has been repeatedly subjected to the fall of asteroids of different sizes.Putting forward the version about why dinosaurs became extinct, the adherents of the theory of "asteroid bombardment" indicate the approximate time of their similarity fall and mass extinction of dinosaurs.It is worth noting that this theory is only partially supported by the scientists: physicists say enough edinokratnogo fall, citing studies Chicxulub crater on the astronomical calculations of the collision of Earth with other celestial bodies.They are opposed by geologists and paleontologists, arguing that the dramatic changes in the fauna of the earth's surface can only occur as a result of multiple fall.Whatever it was, in this case, it does not matter from what dinosaurs from edinokratnogo or multiple asteroid.The main thing is that as a result the majority of species have been wiped out almost edinomomentno.
different version put forward by those who as the main cause of death points to increasing levels of radiation.This event, scientists say, has led to the fact that the Earth began to receive less sunlight because of the physical and chemical processes that took place in the earth's atmosphere.As a consequence, there was a widespread cooling that is detrimental impact on cold-blooded species.In addition, the amount of radiation that penetrated the atmospheric layers, also had a negative impact on the biological processes of reproduction, reducing them to almost zero.
The theory of why dinosaurs became extinct, are, so to speak, one-sided character.As a rule, all the "extra-terrestrial" hypothesis built pundits that are members of one of these research areas.If this does not take into account other factors that are more fully disclose the extinction of species.
Biological version
If we turn to the other sciences, it is possible to push another number of theories about why dinosaurs became extinct from.The first of these is the theory of global change of the Earth.It took into account a number of factors, namely: the movement of the plates, the change in sea level downward, as a consequence of the first two - the jumps in temperature and changes in the composition of flora and air.
second version of why the dinosaurs became extinct, it is a change in the flora of the planet, based on the movement of tectonic plates.As a result, the predators were able to more effectively destroy the young and the egg-laying dinosaurs, and thus regulate the reproduction of this species in the decrease.
These are the main theories that try to explain why the dinosaurs became extinct.As can be seen, each of which relies on any one factor, and the rest is given secondary importance.Therefore it is important to combine the parts of the hypotheses are confirmed by material evidence and, based on a single display.
