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.

Hagia Sophia (Istanbul)

The church of the 'Holy Wisdom', built in the Byzantine Empire, had been one of the...

The ear and the mechanism of hearing

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

Perimeter, area, surface area and volume

This animation presents the formulas to calculate the perimeter and area of shapes as...

Tyrannosaurus rex ‘tyrant lizard’

Large carnivores, perhaps the best known of dinosaurs.

Acropolis (Athens, 5th century BC)

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

Volcanic activity

This animation demonstrates different types of volcanic eruptions

Colosseum (Rome, 1st century)

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

Seawater desalination

The desalination process produces drinking water from seawater.

Human body (male)

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

Formation of the Earth and Moon

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

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

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

The Alhambra in the 16th century (Spain)

The name of this magnificent palace complex originates in Arabic and means 'the red one'.

Icebergs

Icebergs are blocks of frozen freshwater floating in the sea.

The Moon

The Moon is the Earth's only natural satellite

Evaporation and boiling

What happens in a liquid during evaporation and boiling? What does its boiling point...

Metropolises

A metropolis is a large city with a population of over 1 million people.

Ictíneo II submarine

The submarine designed by the Spanish inventor Narcís Monturiol was a pioneering work in...

Palaeolithic cave

The first dwellings in human history provide a lot of information about the lifestyle of...

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