Fokker Dreidecker I (1917)

The German triplane was perhaps the best known plane in World War I.

Viking longship (10th century)

These excellent shipbuilders and sailors travelled great distances on the seas and rivers.

Calcium carbonate (CaCO₃)

Limestone is a widely and diversely used material.

Chlorination of methane by a substitution reaction

During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.

Soap

Fatty acid molecules consist of a polar head and a non-polar tail, therefore they are suitable for removing fat stains.

Formation of hydrogen molecules

Hydrogen atoms within hydrogen molecules are held together by a covalent bond.

Cube of cubes

An exercise about the regular hexahedron built from unit cubes to help deepen your knowledge of cubes.

Guillotine

The device designed to carry out executions more humanely than before was named after a French doctor.

RNA

A polynucleotid made up of phosphoric acid, ribose, and nucleobases (cytosine, uracil, adenine and guanine).

Robots

An entertaining game about different views of spatial objects.

Jamestown (17th century)

Jamestown, founded in 1607, was the first permanent English settlement on the east coast of North America.

Working-class district (19th century)

Typical working-class districts with unhealthy living conditions were built at the time of the Industrial Revolution.

Medieval dungeon

A wide variety of torture devices were in use in medieval dungeons.

Cuboid

A cuboid is a polyhedron with six rectangular faces.

Cube

This animation demonstrates the components (vertices, edges, diagonals and faces) of the cube, one of the Platonic solids.

Cannon operation (18th century)

The cannon was an important type of firearms at the beginning of modern history, widespread both on land and water.

MÁV M61 diesel engine (1963)

The legendary M61 class locomotives of the Hungarian State Railways were manufactured by Nohab.

Venice in the Middle Ages

Medieval Venice owed its wealth to its flourishing maritime trade.

Blitzkrieg strategy (1939-1940)

This effective strategy was based on the fast and synchronised attack of different branches of the army.

Medieval smithy

The work of smiths – one of the first professions in history – became even more important in the Middle Ages.

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