The device designed to carry out executions more humanely than before was named after a French doctor.
Jamestown, founded in 1607, was the first permanent English settlement on the east coast of North America.
The German liquid-propellant rocket, developed during WWII, was the first known man-made object to reach space.
The ´Flying Fortress´ was developed for the United States Army Air Force by Boeing
Typical working-class districts with unhealthy living conditions were built at the time of the Industrial Revolution.
Spitfire was a legendary British single-seat military aircraft used in World War II.
A cuboid is a polyhedron with six rectangular faces.
A wide variety of torture devices were in use in medieval dungeons.
As the Roman Empire expanded, military camps were established on the newly conquered territories.
Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.
Wind power stations convert the kinetic energy of the wind into electricity.
The ancient city located near the river Euphrates was an important Sumerian centre.
Entertaining and spectacular animation to practise orientation in space.
Electrochemical processes in a lead-acid battery produce electric current.
The two main parts of the central nervous system, the brain and the spinal cord are protected by the skull and the spinal column.
The staggered conformation of ethane is more stable than the eclipsed conformation.
Edges, diagonals and faces of a cube can be identified by its vertices.
The arms are moved by flexor and extensor muscles.
The Möbius strip and the Klein bottle are special two-dimensional surfaces with only one side.
The conic section is a plane curve that is created when a right circular cone is intersected by a plane.