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Altitudinal zonation

In mountainous areas the climate, soil properties, the flora and fauna change depending on elevation.

3D puzzle

This exciting and colourful game is designed to develop spatial perception. You can check your solutions using isometric views.

Solids of revolution

Rotating a geometric shape around a line within its geometric plane as an axis results in a solid of revolution.

Nose, the mechanism of smelling

Olfactory receptors produce electric signals when stimulated by odours.

Aeolian landforms in deserts

Wind, as an external force, plays an important role in shaping deserts.

Ocean currents

The Great ocean conveyor is a planet-wide system of ocean currents, which has a great influence on the Earth´s climate.

Mechanism of taste reception

Taste receptors convert chemical stimuli into electric signals.

The Black Death (Europe, 1347–1353)

The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.

Circulatory system

Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.

Roman snail

A widespread snail species, also popular as food.

Organisation of genetic material

Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.

Wright Flyer I (1903)

The Wright Flyer was the first successful powered, heavier-than-air aircraft, designed and built by the Wright brothers.

Nikola Tesla's laboratory (Shoreham, USA)

This physicist-inventor and electrical engineer who mainly dealt with electrotechnics was undoubtedly one of the most brilliant figures of the second...

The life cycle of vertebrates

The life cycle of vertebrates starts with the production of the reproductive cells of an individual and ends with the production of the reproductive cells...

Theatre of Pompey (Rome, 1st c. BC)

The building commissioned by Pompey the Great was the first permanent theatre in Ancient Rome.

Motorway design and construction

We can travel on dual carriageways on the motorway.

Teotihuacan (4th century)

Majestic even in its ruins, this city was the largest and most populous settlement in the pre-Columbian Americas.

Interesting astronomy facts

This animation presents some interesting facts in the field of astronomy.

European garden spider

This animation demonstrates the anatomy of spiders through the example of a common European species.

Euglena viridis

Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and heterotrophically.

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