Of the five thousand known species of cockroaches, only 30 can hurt people, while plenty of rest is a great benefit to nature and people. To stand up for insects, which the average person rarely feels sympathy, said the zoologist George Beccaloni from London natural history Museum.
According to the scientist, a variety of cockroaches live on every continent except Antarctica, and they can be found in a variety of climatic zones, from forests to deserts. Especially great is the diversity of these animals in the tropical latitudes, where constantly maintained high temperature, reports “bi-Bi-si”. However, to adapt these insects are even able to quite extreme conditions — for example, one species lives on mount Everest at an altitude of over five thousand meters above sea level. This is due to the fact that the cockroaches of different species vary considerably among themselves.
However, Beccaloni focuses not only on the “survivability” of cockroaches, which is far from science people often know, and not just for their diversity, which most know is not much, but on the fact that often, these insects often have enormous ecological importance. Besides the fact that cockroaches often are themselves food for animals and sometimes even human, they eat decaying organic materials such as leaf litter or loose bark, and turn them into valuable nutrients for other organisms. In the example of a scientist results found in Australia giant cockroach-Rhino’s body length reaches 8 inches, and all — over 30 grams, which is more than respectable for insects. Although such a “large” creature outwardly, it may seem dangerous to humans, indeed it is, as more than 99 percent of all species of cockroaches on Earth, there is no threat to people is not.
A zoologist also refuted the popular myth that cockroaches can without apparent difficulties to survive a nuclear blast. As it turned out, lethal dose of radiation five times higher than for humans, and insects can be the result is one of the lowest.