Carbon dioxide (CO₂) (intermediate)

Colourless, odourless, heavier-than-air gas. Necessary for the photosynthesis of plants.

Tiktaalik

A transitional form between fish and tetrapods, or four-limbed vertebrates.

Satellite navigation, GPS

The Global Positioning System consists of 24 satellites but only 4 have to be visible for positioning.

Soma cube

Three-dimensional assembly puzzle with solutions.

European colonisation of the Americas (up to 1763)

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

Opera House (Sydney, 1973)

Due to its design and location, the Opera House of the Australian city is one of the most extraordinary opera houses in the world.

Katie on the playground

A colourful and entertaining animation to practise orientation in space.

The Battle of the Catalaunian Plains (451)

The Roman army, led by Flavius Aetius, stopped the Hun invasion led by king Attila

Treasury of Atreus (Mycenae, 14th century BC)

A beehive tomb on the site of the ancient city of Mycenae, attributed to the legendary king.

Alesia (France, 1st century BC)

The Gaul city Alesia, defended by Vercingetorix, was besieged by the Roman forces of Julius Caesar in 52 BC.

Gold mining (19th century)

The California Gold Rush started in 1848, near San Francisco.

Macedonian phalangite (4th century BC)

Soldiers of the ancient Macedonian Kingdom were dreaded warriors.

Fire brigade

This animation demonstrates the construction of a fire engine.

Modern office building

Saving energy and protecting the environment are important factors in the design of modern office buildings.

The battle of Actium (31 BC)

In the battle fought at the shores of Hellas, Octavian won a decisive victory over Marcus Antonius.

World religions today

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

Suction pumps and direct action pumps

Direct action pumps and suction pumps are among the simplest water pumps.

Ambulance car

This animation demonstrates the most important equipment of ambulance cars.

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