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Ringed silkworm is everywhere. You will find it in the forest, in the park, and in the garden. It lives in the Caucasus and the Urals. The foresters complain that it damages the oaks, gardeners protect the apple trees from it. The caterpillar of the ringed silkworm feeds on the leaves of many trees: oak, elm, birch, willow, alder, cherry, rowan, apple, pear, cherry...

In summer, large white butterflies fly in the gardens. On their wings there are no spots or strips, but veins appear through the pollen covering them. The name of this butterfly is hawthorn. Hawthorn sits on flowers: here she feeds - sucks sweet juice. She sits down and on the leaves of the trees, on the grass - here she rests. Butterflies hawthorn sit on apples, pears...

In Southern Kazakhstan, Central Asia, Transcaucasia, on trees and bushes, you can often see large insects with a bizarrely extended body, long legs and without wings. They are stickmen. They are inactive, but when the danger approaches, they freeze and become like a dry stick or leaf, so it's difficult to notice them. And if the pursuer still finds a stick? Then all the hope for chemical weapons of insects...

In science, the revealed mystery often turns into a new mystery. So, for a long time the mysterious ability seemed like bats can navigate in the dark, until they showed up that they are armed with peculiar locators. Everything became clear. However, only at first glance. For example, one hundred bats fly. A hundred squeals are heard in the air...

Such a comparison does not seem absurd to a biologist. Perhaps he will only advise adding one more word to this phrase: blue, like the blood of an octopus or, say, the blood of a horseshoe. Human blood and other vertebrates red color indicates hemoglobin - a substance that carries oxygen from the lungs to the outermost corners of the body...

A series of experiments conducted by scientists from different countries led to interesting and sometimes unexpected conclusions. So, it turned out that the permanent magnetic field is relatively harmless: the harmful effect of the magnetic field is manifested only at great tensions. Where things are more difficult with variable magnetic fields, even if they are rather weak. It is known, for example...