3D puzzle

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

Muscle tissues

The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.

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.

Deforestation

Deforestation has a negative impact on the environment.

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

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

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.

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...

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.

Teotihuacan (4th century)

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

Motorway design and construction

We can travel on dual carriageways on the motorway.

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.

European crayfish

A type of large freshwater crayfish widespread in Europe.

How do seas shape the Earth's surface?

Seawater, as an external force, plays an important role in shaping coastlines.

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