Viruses and viral diseases
The virus is an infectious agent that does not have a cellular structure, and is capable of reproducing only within cells of living organisms. For this they are referred to…

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The importance of swamps in nature
The swamp is a part of the earth's surface, which has excess moisture, high acidity and low soil fertility, which is the consequence of raising the ground water to the…

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Lizards and their peculiarities
Lizards are a subcatch of scaly reptiles. Its composition includes practically all flaky reptiles, with the exception of snakes. And with snakes, by the way, many lizards are very similar.…

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ocean covers

World ocean and its properties

The ocean covers about 70% of the surface of our planet. Thus, it is an aquatic membrane, stretched almost all over the surface of the Earth. The oceans are continuous, and wash areas of land on all sides, be it continents, or islands.

The ocean on the map
The author of the photo is Link576, the link to the original (photo has been changed).
Parts of the world ocean Continue reading

Pollution of reservoirs
Water pollution is a serious environmental problem. Indeed, water is essential for the existence of all living organisms, including humans. But its contamination makes it impossible to use water for…

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Flies and their role in nature
Flies are very common flying two-winged insects. They inhabit practically all warm areas of the planet, delivering many problems to living organisms, including people. After all, flies are the carriers…

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