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The ´Flying Fortress´ was developed for the United States Army Air Force by Boeing
Spitfire was a legendary British single-seat military aircraft used in World War II.
A wide variety of torture devices were in use in medieval dungeons.
Typical working-class districts with unhealthy living conditions were built at the time of the Industrial Revolution.
The device designed to carry out executions more humanely than before was named after a French doctor.
Ancient Roman conquerors had effective siege engines developed for attacking fortifications.
Ancient Egypt was called the ‘gift of the Nile’, since the river played an important role in the rise of Egyptian civilisation.
As the Roman Empire expanded, military camps were established on the newly conquered territories.
The city with advanced culture was the first settlement in history to have a citadel.
The Olympic Games, held in the town every 4th year after 776 BC made it one of the centres of ancient Greece.
Farming techniques evolved with the development of human civilisation in the Middle Ages and the Modern Age.
The cannon was an important type of firearms at the beginning of modern history, widespread both on land and water.
These excellent shipbuilders and sailors travelled great distances on the seas and rivers.
Learn about types of towers and bastions typical of medieval Europe.
Jamestown, founded in 1607, was the first permanent English settlement on the east coast of North America.
Hydrogen atoms within hydrogen molecules are held together by a covalent bond.
Soap is a detergent consisting of sodium or potassium salts of long-chain fatty acid molecules, suitable for removing fat stains.
Building 3D shapes into a given cube mesh with the help of several views.
During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.
The purpose of the electricity supply network is to provide electricity for users.
Satellites orbiting the Earth can be used for civilian or military purposes.
