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Red squirrel

These arboreal animals adjust easily to urban environment; it's easy to find them in gardens and city parks.

Glass manufacture

We regularly use various glass objects in our everyday lives. But how are they made?

Spoil heap

Mining is an important industrial activity, but it can cause irreversible damage to the environment and destroy the landscape.

Rubbish dump

Rubbish dumps are usually located at smaller settlements with a small population, near larger towns.


The main purpose of firefighting is to extinguish destructive fires. Firefighters' main objectives include saving lives and protecting the environment.

Growing up

How does a child turn into an adult? What are the stages of development he goes through?

The Soviet Union during the Stalin era

The establishment of Stalin’s dictatorial regime and its consequences.


Pollination is the start of the fertilization process of plants.


Dragonflies are aquatic in their larval stage. They are predator insects, easily recognisable by their two pairs of transparent wings.

Field horsetail

A perennial plant with a rhizomatous stem, the length of which may reach 2-3 m. The height of the plant above ground, however, is only 50-60 cm.

Birds of prey

This video is about birds of prey that hunt mainly vertebrates.


Summer is one of the four seasons of the temperate climate zone. The days are the longest and the weather is the hottest during this season.

Fluvial incision

Upper-course river features include V-shaped valleys, interlocking rapids and waterfalls.


Mosses are plants that can be found all over the world. It is an interesting fact that even after 400 years they are able to revive as soon as sunlight...


Mushrooms have a special role in the world of living organisms. Their most important task is to decompose organic, mainly plant materials.


The order with the largest number of bird species within the class Aves. Their common characteristic is that they use the syrinx at the base of their...


Most species of sedges grow in swamps, wetlands and other watery places where they usually dominate the flora.

Siberian tiger

This tiger subspecies it is largest of all the big cats. It kills one large prey about every five days, of which it is able to devour 50 kg of meat in one go.


Fog is a shallow layer of cloud close to ground level. When it descends, visibility drops drastically and road traffic may come to a standstill.

Igneous rocks

Igneous rocks, like andesite and basalt, are formed when erupting lava solidifies on the surface. Due to erosion over millions of years signs of past...

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