Viking stave church (Borgund, 13th century)

A wooden church built in the 12th-13th centuries, the best preserved of Norway´s stave churches.

Gutenberg's press (Mainz, 15th century)

Life magazine picked Gutenberg's invention of mechanical movable type printing as the most important event of the second millennium.

Deep Sea Hydrothermal Vents

A hydrothermal vent is a fissure in the planet's surface through which geothermally heated water erupts.

The Sun

The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.

Respiratory system

The respiratory system is responsible for the intake of oxygen and the release of carbon dioxide.

Pyramid of Djoser (Saqqara, 27th century B.C.)

The step pyramid, built in the 27th century B.C., was the first pyramid in Egypt.

European garden spider

This animation demonstrates the anatomy of spiders through the example of a common European species.

Countries of the World

Learning about the geographic location, capitals and flags of the world´s countries through exercises in three levels of difficulty.

Roman snail

A widespread snail species, also popular as food.

Mushrooms

A mushroom is the fleshy fruiting body of a fungus, made up from hyphae.

Euglena viridis

Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and heterotrophically.

European crayfish

A type of large freshwater crayfish widespread in Europe.

Hot-air balloon (18th century)

The French Montgolfier brothers were the first pioneers of flying.

Synaptic transmission

Neurons transmit electrical signals via chemical and electrical synapses.

Baths of Caracalla (Rome, 3rd century)

The magnificent bath complex of the Roman Emperor was built in the 3rd century A.D.

Watt´s steam engine (18th century)

The steam engine, perfected by the Scottish engineer James Watt, revolutionized technology.

Moon landing: July 20, 1969

Neil Armstrong, one of the crew members of Apollo 11 was the first man to set foot on the Moon.

Environmentally friendly vehicles

Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.

Tsunami

Tsunami waves are very high waves of immense destructive power.

Pantheon (Rome, 2nd century)

The ´Temple of all gods´ was built during the reign of the Roman Emperor Hadrian.

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