Four-stroke Otto engine

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

Volcanic activity

This animation demonstrates different types of volcanic eruptions.

The ear and the mechanism of hearing

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

Colosseum (Rome, 1st century)

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

Seawater desalination

The desalination process produces drinking water from seawater.

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

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

Perimeter, area, surface area and volume

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

Formation of the Earth and Moon

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

Tyrannosaurus rex ‘tyrant lizard’

Large carnivores, perhaps the best known of dinosaurs.

Hagia Sophia (Istanbul)

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

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...

B-24 Liberator

The B-24 Liberator was an American heavy bomber aircraft, built in large numbers, that...

Paleolithic cave

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

Quetzalcoatlus, a giant pterosaur

Quetzalcoatlus was one of the largest known flying animals of all time.

Unmanned aerial vehicles (UAV)

The range of applications of unmanned aerial vehicles ('drones') keeps growing.

Structure of skeletal muscles

This animation demonstrates the fine molecular structure and mechanism of muscles.

Ancient Roman domus

Wealthy citizens in ancient Rome owned large houses with varied layouts of several rooms.

Ancient Greek house

The average house in Ancient Greece had a rectangular, geometrical floor plan and two...

Synaptic transmission

Neurons transmit electrical signals via chemical and electrical synapses.

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