Pollution

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.

Formation of the Earth and Moon

This animation demonstrates how the Earth and the Moon were formed.

Seawater desalination

The desalination process produces drinking water from seawater.

Colosseum (Rome, 1st century)

The most famous and most magnificent amphitheater of Rome was built in the 1st century.

Volcanic activity

This animation demonstrates different types of volcanic eruptions.

Nizwa Fort (Oman, 17th century)

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

Perimeter, area, surface area and volume

This animation presents the formulas to calculate the perimeter and area of shapes as well as the surface area and volume of solids.

Human body (male)

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

Four-stroke Otto engine

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

Hagia Sophia (Istanbul)

The church of the "Holy Wisdom," built in the Byzantine Empire, had been one of the largest religious buildings until 1935, when it was converted into a museum.

Tyrannosaurus rex ‘tyrant lizard’

Large carnivores, perhaps the best known of dinosaurs.

Acropolis (Athens, 5th century B.C.)

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

Interesting geography facts – Physical geography

This animation presents some interesting facts in physical geography.

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

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

Reindeer

Reindeer are the northernmost deer species.

Water pollution

The main sources of water pollution are industry, agriculture and urban areas.

Glands connected to the duodenum

The pancreas and the liver empty digestive juices into the duodenum.

Atmospheric circulation

The difference between the temperature of the polar and equatorial zones causes atmospheric circulation which is affected by a number of factors, including...

ISS

The International Space Station is a habitable satellite built with the cooperation of 16 countries.

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