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One of the main units of Matthias Corvinus´ Black Army was the cavalry.
Television, invented in the early 20th century, became one of the basic forms of entertainment.
German sordiers in the First World War were well trained and used modern weapons.
During World War I, Britain was part of the military alliance called the ´Triple Entente´.
The surface of a sphere consists of the set of points which are all at the same distance from a given point in space.
Calculating the volume of a sphere is possible using an appropriate cylinder and cone.
The US Marine Corps is an important branch of the US Armed Forces, with about 200 thousand, specially trained members.
Subterranean rodents widespread in Central- and Eastern Europe.
Pollen serves to fertilise the egg of plants. Pollen grains come in a variety of shapes and sizes, characteristic of the species.
This animation demonstrates how sonar works.
This animation demonstrates how lifts work.
A transitional form between fish and tetrapods, or four-limbed vertebrates.
The Canadian helicopter is one of the most widely used helicopters in the world.
Colouring the vertices, edges and faces of a given cube according to the criteria specified in the exercise.
Remnants of Ottoman architecture in Hungary include the Gazi Kasim Pasha Mosque in Pécs and the Minaret of Eger.
Egyptian Pharaohs were respected as gods, they were lords of life and death.
The Mir Castle Complex, situated in the town of Mir, Belarus was built in the Gothic-Renaissance style.
Several European countries joined the conquest of the New World, making America a colourful continent.
The California Gold Rush started in 1848, near San Francisco.
The dreaded warriors of the Mongol Empire helped to make it one of the largest empires in history.