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Kepler´s laws of planetary motion

The three important laws describing planetary motion were formulated by Johannes Kepler.

Atomic bombs (1945)

The atomic bomb is one of the most destructive weapons in human history.

Meiosis

Our gametes are haploid cells produced from diploid cells by meiosis, a special type of cell division.

Viking stave church (Borgund, 13th century)

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

Deep-sea hydrothermal vents

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

The Sun's path above the major circles of latitude

The apparent movement of the Sun is caused by the Earth's rotation around its axis.

Offshore natural gas extraction, Norway

The Troll A is an offshore natural gas platform, the largest offshore platform ever built: it rises about 170 metres above water level, weighs 656,000...

Syrian water wheels (City of Hama, 13th century)

Medieval Syrian water wheels were used to convey water to distant areas.

The Berlin Wall (1961-1989)

A symbol of division and oppression, the Wall tore a city and numerous families apart.

Lightning

Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.

Countries of the World

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

The White House (Washington, DC, 1800)

One of the best known buildings in the world, this is the residence and office of the President of the United States.

Dynamo (intermediate)

A dynamo converts mechanical energy into direct current.

The Rutherford experiment

The Rutherford Experiment proved the existence of positively charged atomic nuclei. The results led to the elaboration of a new atomic model.

Aluminium smelting

Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.

How does it work? - Water tap

This animation demonstrates the functioning of the 3 basic types of water tap.

Cilvēka ķermenis (sieviete)

Šī animācija iepazīstina ar cilvēka ķermeņa svarīgākajām orgānu sistēmām.

Common bottlenose dolphin

Bottlenose dolphins are sea mammals which use ultrasound for orientation.

Himeji Castle

Located close to Osaka, the Japanese castle is also called the White Heron because of its white exterior.

Bacteria (spheres, rods, spirals)

Bacteria occur in a wide range of shapes, including spheres, rods and spirals.

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