Cortical organisation of speech

Producing speech requires the synchronised operation of several cortical centres.

Colonisation and decolonisation

The colonising powers´ colours were wiped off the map by the nations fighting to regain their independence.

Mycenae (2nd millenium BC)

The city with advanced culture was the first settlement in history to have a citadel.

The urinary system

The urinary system serves for the removal of harmful and useless materials from the body.

Nitrogen cycle

Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of various compounds.

Tidal power station

Tidal power stations utilise the daily fluctuation of the water level for producing electricity.

Neptune

Neptune is the outermost planet of the Solar System, the smallest of the giant planets

Open-cast mine

As opposed to underground mines, in open-pit mines the layers covering coal are removed, coal is extracted on the surface.

Karst region (intermediate)

Karst formations include dolines and dripstones.

Fokker Dreidecker I (1917)

The German triplane was perhaps the best known plane in World War I.

Sewage treatment plant

Treated sewage water can be used in agriculture and industry.

Ferrous metallurgy (intermediate)

Raw iron is produced from iron ore in iron smelters.

Climate zones

The Earth is divided into geographical and climatic zones, which result in the zonation of vegetation.

Voyager space probes

The Voyager space probes were the first man-made objects to leave the Solar System. They gather data about outer space and carry information about humanity.

Neurons, nervous tissue

Neurons are cells specialised for transmitting electric signals.

Seafloor map

The boundaries of tectonic plates can be seen on the seafloor.

Archimedes’s military inventions (3rd century BC)

Archimedes was one of the most brilliant Greek scholars of ancient times, who made his mark with military inventions as well.

USS Ohio (US, 1979)

Nuclear propulsion was first used by the US Navy for powering submarines in the mid-20th century.

Cuboid

A cuboid is a polyhedron with six rectangular faces.

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