The connection between the volume of a square pyramid and the volume of a prism

In this experiment we prove that the volume of the prism is three times the volume of the square pyramid.

The lily of the valley

A plant native to the temperate regions of Europe and Asia that lives mostly in oak forests.

Onion processing

The onion is a perennial, bulbous plant with a characteristic taste and fragrance, caused by a sulphurous compound the plant produces.

The common pond skater

A fascinating aquatic insect species that is able to 'walk' on the water using surface tension.

Protein denaturation

Proteins are sensitive to environmental changes. In this video we demonstrate how easy it is to modify their molecular configuration.

Fruits of the forest

Conspicuous, bright-coloured berries are delicious food for birds but some of them may be poisonous for people.

The greater flamingo

A video about a pink wading bird with an arcuate bill. Its peculiarity is that it sleeps standing on one leg.

Coast of Montenegro

Naturally well-suited for development of all kinds of tourism, Montenegro is focused on becoming an elite tourist destination.

The small-leaved lime

This tree species, native to the Carpathian basin, grows slowly and is relatively undemanding. In some cases its leaves can be larger than those of the...

The rhinoceros family

The main characteristic of the rhinoceros is the horn at the front of its skull, which it uses to attack as well as to protect itself.

The white poplar

A forest tree species characteristic of floodplains. It survives long periods of time in saturated or completely flooded ground.

Horse chestnut

This popular tree is native to south-eastern Europe. In the autumn children love playing with its seeds.

Gated communities

People with a higher social position tend to separate themselves from the lower social classes. Establishing closed housing estates called gated communities...

The process of waste management

Waste thrown into bins, like paper or plastic objects, go through a long process before being recycled.


It is a sedimentary rock with high calcium carbonate content.


Goats are among the first domesticated animals. They are the close relatives of sheep.

The weather forecast

The weather can be forecast with different meteorological instruments.

Tree peony

This plant originating from East Asia was used in folk medicine as early as 2000 years ago. It is also a decorative plant of gardens.


It is the most common forest tree species in the continental climate zones. It grows slowly. Its timber is a popular raw material in the furniture industry.

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