The Hungarian army in the 15th century (cavalry)

One of the main units of Matthias Corvinus´ Black Army was the cavalry.

The development of television sets

Television, invented in the early 20th century, became one of the basic forms of entertainment.

German soldier (World War I)

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

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 from a given point in space.

Volume of spheres (Cavalieri´s principle)

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

American Marine (beginning of the 21st century)

The US Marine Corps is an important branch of the US Armed Forces, with about 200 thousand, specially trained members.

European ground squirrel

Subterranean rodents widespread in Central- and Eastern Europe.

Pollen

Pollen serves to fertilise the egg of plants. Pollen grains come in a variety of shapes and sizes, characteristic of the species.

Tiktaalik

A transitional form between fish and tetrapods, or four-limbed vertebrates.

Helicopter (BELL 206 Jet Ranger)

The Canadian helicopter is one of the most widely used helicopters in the world.

Colouring a cube

Colouring the vertices, edges and faces of a given cube according to the criteria specified in the exercise.

Ottoman architecture in Hungary (17th century)

Remnants of Ottoman architecture in Hungary include the Gazi Kasim Pasha Mosque in Pécs and the Minaret of Eger.

Egyptian Pharaoh and his wife (2nd millennium BC)

Egyptian Pharaohs were respected as gods, they were lords of life and death.

European colonisation of the Americas (up to 1763)

Several European countries joined the conquest of the New World, making America a colourful continent.

Mir Castle Complex (17th century)

The Mir Castle Complex, situated in the town of Mir, Belarus was built in the Gothic-Renaissance style.

Gold mining (19th century)

The California Gold Rush started in 1848, near San Francisco.

Mongol warrior (13th century)

The dreaded warriors of the Mongol Empire helped to make it one of the largest empires in history.

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