Cromwell´s Ironsides (17th century)

The Ironsides were members of the Parliamentarian cavalry formed by Oliver Cromwell during the English Civil War.

Arab Caliph (7th century)

Caliphs, considered successors of the Prophet Muhammad, were the most important religious leaders of Islam.

Zither

A zither is one of the typical instruments of Hungarian folk music, played by strumming or plucking the strings.

European ground squirrel

Subterranean rodents widespread in Central- and Eastern Europe.

American soldier (World War II)

American soldiers fought in almost all major theatres of World War II.

Four colour theorem

Colour a map with the fewest number of colours possible, so that no two adjacent regions have the same colour.

The development of freight transport

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

Seas and bays

This animation demonstrates the most important seas and bays.

British soldier (World War I)

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

German soldier (World War I)

German sordiers in the First World War were well trained and used modern weapons.

Common blackbird

This animation demonstrates birds' bones and eggs through the example of the common blackbird.

States and cities of the USA

This animation demonstrates the states and largest cities of the USA.

Chain Bridge (Budapest)

The Széchényi Chain Bridge, named after István Széchenyi, was the first permanent bridge across the Danube between Pest and Buda.

Euler's polyhedron formula

The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.

Solids of revolution (exercise)

An exercise about the generation of solids of revolution.

Conic solids

This animation demonstrates various types of cones and pyramids.

Drums

Drums are played by hitting the membrane. There are many versions of drums.

Farm (Hungary, 19th century)

Small farms usually located near the border of rural towns, inhabited by peasants.

Angle of inclination of lines and planes

This animation demonstrates the angle of inclination of lines and planes in various positions.

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