The Great Stupa (Sanchi, 2nd century BC)

The masterpiece of Buddhist architecture is located in India.

Granary in the Indus Valley

Ancient Indians built huge, naturally ventilated storehouses.

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.

Coenzyme A

An acyl-carrier coenzyme taking part in both anabolic and catabolic processes.

Battle of Zama (202 BC)

Scipio’s Roman army defeated Hannibal’s Punic army in the battle fought during the 2nd Punic war in Africa.

World religions today

The geographical distribution of major (world) religions has been influenced by historical events.

Archimedes’ screw (3rd century BC)

The screw pump commonly attributed to Archimedes made irrigation much more effective

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.

Colouring a cube

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

European colonisation of the Americas (up to 1763)

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

Helicopter (BELL 206 Jet Ranger)

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

Administrative divisions of Hungary

This animation presents the regions, counties and cities of Hungary.

Lake steamer (1846)

The first paddle steamer in Hungary entered service in 1846.

Nitrogen-dioxide (NO₂)

A reddish-brown toxic gas, very reactive due to its unpaired electron.

Hydrogen sulphide (H₂S)

A colourless, toxic gas with the characteristic odour of rotten eggs. It occurs in certain mineral waters and spring waters.

Ethene (ethylene) (C₂H₄)

The first member in the homologous series of 1-alkenes.

Hydrogen peroxide (H₂O₂)

The compound of hydrogen and oxygen. Colourless, odourless liquid; heavier than water.

Molecule exercise VII (Organic nitrogen compounds)

An exercise about the groups and structure of organic nitrogen compounds.

Ancient Athenian citizen with his wife

The Athenian democracy was built on the community of citizens with full rights.

Dimethylamine (NH(CH₃)₂)

A colourless gas with a pungent odour. It is widely used in industry.

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