Wonders of the Ancient World

Today only one of the Wonders of the Ancient World is still intact: the Pyramids of Giza.

Pyramid of Djoser (Saqqara, 27th century BC)

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

Mitosis

Mitosis is the process by which a eukaryotic cell divides into two cells and the number of chromosomes remains unchanged.

The Moon

The Moon is the Earth's only natural satellite

Milestones of sculpture

The animation shows five outstanding works in the history of sculpture.

Concorde (1969)

The first supersonic passenger airliner entered service in 1976.

Hotspots

Hotspots are areas of the Earth´s crust where magma often rises to the surface and causes volcanic activity.

Container ships

Commercial maritime routes of container ships form a global network.

The Alhambra in the 16th century (Spain)

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

Taj Mahal (Agra, 17th century)

The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.

USS Missouri (US, 1944)

The battleship USS Missouri, first deployed during WWII was also deployed in the Gulf War.

Knee joint

The knee joint is made up by the femur, the tibia and the kneecap.

Freshwater fishes

Many freshwater fishes are also popular as food.

How does it work? - CRT television

This animation demonstrates how a CRT television works.

Underground coal mining

As opposed to opencast mines, in underground mines the layers covering coal are not removed, coal is extracted from mine shafts.

Common carp

Freshwater fish used as food in many parts of the world.

Fuel cell

A fuel cell provides environment-friendly electric energy produced by the chemical reaction between oxygen and hydrogen.

The reflection and refraction of light

A ray of light is reflected or refracted at the boundary of two mediums with different refractive indices.

Patellar reflex

The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.

Mallard

This animation demonstrates the anatomy of birds through the example of mallards.

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