Conic sections

The conic section is a plane curve that is created when a right circular cone is intersected by a plane.

Conformations of ethane

The staggered conformation of ethane is more stable than the eclipsed conformation.

Fuel cell

A fuel cell provides environment-friendly electric energy produced by the chemical reaction between oxygen and hydrogen.

Shale gas

This animation explains the technology of shale gas extraction.

Medical conditions of the spine

Scoliosis is a medical condition in which a person's spine has a lateral deviation.

Generating alternating current

Electric current can be generated by rotating an armature loop in a magnetic field.

Medieval keep

Keeps were typical buildings in the Middle Ages, also built independently from castles.

Planaria gonocephala

One of the most common types of flatworms.

The first days in school

Learn the concept of colours, numbers, letters and shapes while playing

Lead-acid battery

Electrochemical processes in a lead-acid battery produce electric current.

Voyager space probes

The Voyager space probes were the first man-made objects to leave the Solar System. They gather data about outer space and carry information about humanity.

Battle of Marathon (490 BC)

The marathon running event was instituted in commemoration of the run of a Greek soldier after the Battle of Marathon, fought between the Athenian and the...

Meteorological instruments

This animation demonstrates instruments used to examine atmospheric phenomena.

Battle of Thermopylae (480 BC)

The battle of the Greek-Persian War became famous for the heroic sacrifice of the Spartan soldiers.

Satellite types

Satellites orbiting the Earth can be used for civilian or military purposes.

The Channel Tunnel

The Channel Tunnel is a 50.5 km long railway tunnel between the United Kingdom and France, beneath the English Channel.

Oil refinery

The products of oil refining include diesel oil, petrol and lubricants.

The castle of Eger (16th century)

The castle of Eger got its final shape and became an important component in the new chain of border forts in the 16th century.

Forms of government and official state languages

The animation shows the forms of government and official languages of the world´s countries.

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