Chengdu J-20 Mighty Dragon (China, 2017)

The Chengdu J-20, also known as Mighty Dragon, is a multiple function stealth fighter aircraft.

Colonisation and decolonisation

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

Sphere

A sphere is the set of points which are all within the same distance from a given point in space.

North River Steamboat (Clermont) (1807)

Robert Fulton American engineer created the first operational steam-powered ship.

Time zones

The Earth is divided into 24 time zones. Standard time is the time used within time zones.

Tidal power station

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

Open-cast mine

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

Swallowsville

An entertaining animation to practise orientation using a map.

Teatro Olimpico (Vicenza, 16th century)

The first indoor theatre in modern history to be constructed according to the theatre-building codes of Antiquity was inaugurated in 1585.

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.

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.

House without carbon-dioxide emission

The design and structure of modern houses play an important role in environmental protection.

The Channel Tunnel

The Channel Tunnel is a 50.5 km long railway tunnel between the United Kingdom and France, beneath the English Channel.

Oil refinery

The products of oil refining include diesel oil, petrol and lubricants.

Sailing ships

Schooners, first built in the Netherlands in the 17th century, were mainly used as merchant ships.

USS Tarawa LHA-1 (1976)

From the 1940s, the increasingly large aircraft carriers became the masters of the oceans.

Bireme (ancient oared warship)

A bireme is a type of ancient warship, with a characteristic pointed bow and two decks of oars, used by many armies.

Fat-tailed scorpion

The fat-tailed scorpion is one of the world's most dangerous scorpions.

Tanning, skin cancer

The topmost layer of our skin is the epidermis, which contains melanocytes.

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