How do fish breathe?

Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.

Tall buildings

Tall buildings are mementoes of human history and technological development.

Viruses

Viruses consist of protein and DNA or RNA; they reprogram infected cells to produce more viruses.

Villages

Villages were the first permanent human settlements

Euler's polyhedron formula

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

Junkers JU-52 (1932)

The most popular European-made transport aircraft before World War II.

Moon radar experiment (Zoltán Bay, 1946)

In 1946 a Hungarian scientist was the first person to detect radar echoes from the Moon.

Drums

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

Romanesque style Benedictine church (Ják, Hungary)

A Romanesque style Benedictine church with a special gateway, built in the 13th century in Hungary.

Eiffel Tower (Paris, 1889)

The iron lattice tower, erected for the 1889 World Fair, became the symbol of the capital city of France.

Messerschmitt Bf 109 G (Germany, 1941)

A legendary fighter plane used by the German air force in World War II.

U-2 ’Dragon Lady’ (USA, 1957)

The efficient reconnaissance aircraft has been used by the CIA since the Cold War.

The Hungarian Crown Jewels

The best-known piece of the Hungarian Crown Jewels is the Holy Crown.

Tanks (World War I)

Tanks developed in the mid-1910s quickly became the most important weapons of land-based military operations.

German soldier (World War II)

Soldiers of the Wehrmacht in World War II were well-trained and well-equipped with modern weapons.

Belgrade (15th century)

The castle of Belgrade (Nándorfehérvár) was one of the most important components in the chain of Hungarian border forts.

States and cities of the USA

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

Solids of revolution (exercise)

An exercise about the generation of solids of revolution.

Conic solids

This animation demonstrates various types of cones and pyramids.

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