Southern wood ant

An ant colony consist of a queen, male ants and workers.

Fat molecule

Three saturated fatty acid molecules linked to a glycerol molecule.

Bulbous spring plants

This animation demonstrates the anatomy of tulips, daffodils and snowdrops.

Freshwater fishes

Many freshwater fishes are also popular as food.


Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.

System of public utilities

System that satisfies consumers’ demands of water supply, wastewater disposal, electricity, heat and gas supply and telecommunication.

The withdrawal reflex

The withdrawal reflex is a spinal reflex that ensures moving away from potentially damaging stimuli.

Air pollution

This animation demonstrates the main sources of air pollution: agriculture, industry and urban settlements.

Emperor penguin

Penguins are birds living in the Antarctic and adapted to cold temperature and swimming.


Airports provide infrastructure and services necessary for aviation.

Blue whale

Marine mammals, the largest known animals to have ever existed.

Effects of smoking on the lungs

Smoking severely damages the respiratory system, it may cause COPD or lung cancer.

Solomon's Temple (Jerusalem, 10th century BC)

Solomon's temple became one of the most important symbols of Jewish architecture.

Hard disk drive

Computer hard disk drives are devices of magnetic data storage.

Medieval Chinese Emperor

The Emperor of the vast Far-Eastern empire was the lord of life and death.

Common earthworm

The anatomy of annelids is demonstrated through the example of the common earthworm.

European mole

Moles are small subterranean mammals with modified, spade-like forelegs.

Typical dwelling types

Every era and every culture has specific residential buildings.

Milky Way

The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion stars, one of which is our Sun.

Southern plantation with slaves (USA, 19th century)

Before the American Civil war the use of slaves on plantations was typical in the Southern states.

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