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Pollution is the detrimental effect of human activity on the natural environment.

The ear and the mechanism of hearing

The ear converts the vibrations of air into electric signals which are then processed by the brain.

Four-stroke Otto engine

This animation demonstrates the type of engine most commonly used in cars.

Nizwa Fort (Oman, 17th century)

The round tower of the largest fort in the Arabian Peninsula had an ingenious defence system.

Acropolis (Athens, 5th century BC)

The world's most famous citadel, the Acropolis of Athens was built in the 5th century BC, during the Age of Pericles.

Human body (male)

This animation introduces the most important organ systems of the human body.

Leonardo da Vinci’s workshop (Florence, 16th century)

Visit the workshop of the Renaissance polymath and his most influential inventions and works of art.

The Temples of Abu Simbel

During the construction of the Aswan High Dam, the Temples of Abu Simbel were relocated.

Notre-Dame Cathedral (Paris, 14th century)

The Gothic cathedral is one of the best-known buildings in the French capital.


The aerospace manufacturer company, founded in 2002, revolutionised space research by designing reusable rockets.

Construction technologies

Human constructions can be built using various technologies regarding their material, structure and the interactions of forces they have to withstand.

European hare

A common hare species found in most temperate regions of the world.

Polar bear

The polar bear is a large land carnivore that inhabits the Arctic.

Purple sea urchin

The most common species of sea urchin in the Mediterranean Sea and eastern Atlantic Ocean.

Studenica Monastery (Serbia, 12th century)

The most important monastery in Serbia, considered the birthplace of the independent Serbian Orthodox Church and the state.

Indian lotus

A large, spectacular aquatic plant that is an important symbol in various Asian cultures.

Space tourism

Until the early 21st century, space travel served scientific purposes exclusively. Then, space tourism appeared.

Famous engineering mistakes

Throughout history, engineers have come up with a lot of brilliant technological solutions, but, in numerous cases, they have committed serious mistakes as...

What is cotton fabric made from?

The cotton plant is cultivated for one of the most important raw materials of the textile industry.

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