Nitrogen (N₂) (intermediate)

A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.

Ancient Roman infantry tactics

Members of the ancient Roman Legions were the masters of military tactics.

British soldier (World War I)

During World War I, Britain was part of the military alliance called the ´Triple Entente´.

Surface area of spheres (demonstration)

The surface of a sphere consists of the set of points which are all at the same distance...

Volume of spheres (Cavalieri´s principle)

Calculating the volume of a sphere is possible using an appropriate cylinder and cone.

Fire brigade

This animation demonstrates the construction of a fire engine.

Dóm Square (Szeged, Hungary)

The Votive Church of Szeged, located on the Great Plains of Hungary, emerges from the...

Saker falcon

The saker falcon is a large bird of prey widespread in Europe and and Asia.

Bourgeois salon

This animation compares a modern living room and a typical bourgeois salon.

Local winds

The most important types of local winds are the sea-land breeze, the mountain-valley...


Alkanes are saturated hydrocarbons which can be organised into a homologous series.

The development of freight transport

This animation demonstrates the development of freight transport, from horse-drawn carts...

Medieval towers and bastions

The structure of fortresses developed together with military technology.


Change of light conditions in different seasons. Measuring height using shadows.


A prehistoric amphibian and an early representative of the Tetrapods, which became...

Ckifsky алтын жауынгер (б.э.д. 3 ғасырда)

Қазақстанда, Есік қорғанынан қазба жұмыстары кезінде ретінде белгілі доспехи жауынгер,...

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