Saturn

Saturn is the second largest planet in the Solar System, easily recognisable by its rings.

Panthéon (Paris, 18th century)

The most important Neoclassicist building in France, completed in 1791, became the final resting place of many of France´s greats.

Working-class district (19th century)

Typical working-class districts with unhealthy living conditions were built at the time of the Industrial Revolution.

Medieval dungeon

A wide variety of torture devices were in use in medieval dungeons.

Dissolution of NaCl

Common salt is dissolved by water: polar water molecules form a coat around the ions.

Melting and freezing

During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.

Polymerisation of ethene

Polymerised ethylene is known as polyethylene, a type of plastic.

Geothermal power station

Geothermal power stations convert energy of hot, high-pressure water found in deeper layers of the Earth into electricity.

Viking longship (10th century)

These excellent shipbuilders and sailors travelled great distances on the seas and rivers.

Blitzkrieg strategy (1939-1940)

This effective strategy was based on the fast and synchronised attack of different branches of the army.

Gothic cathedral (Clermont-Ferrand, 15th century)

The cathedral named after the Assumption of Mary into Heaven is one of the gems of French Gothic architecture.

Cannon operation (18th century)

The cannon was an important type of firearms at the beginning of modern history, widespread both on land and water.

Stearic acid (octadecanoic acid) (C₁₇H₃₅COOH)

Solid, white substance, a constituent of vegetable oils and animal fats.

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.

Medieval smithy

The work of smiths – one of the first professions in history – became even more important in the Middle Ages.

Battle of Thermopylae (480 BC)

The battle of the Greek-Persian War became famous for the heroic sacrifice of the Spartan soldiers.

Swallowsville

An entertaining animation to practise orientation using a map.

Aerodynamic lift

Due to their asymmetrical profile of the wings, lift is produced while flying at a high speed.

Cellulose (C₆H₁₀O₅)n

The building material of the cell walls and fibres of plants.

Submarine operation

Submarines submerge and surface by changing the average density of the hull.

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