Cereals are species of grasses cultivated for their edible grains.
Machines converting the energy of wind into useful forms of power were already in use in the Middle Ages.
The screw pump commonly attributed to Archimedes made irrigation much more effective
The popular model of the American automobile factory was the first mass-produced car in the world.
Hero of Alexandria is the inventor of the first steam engine, although he regarded it as an entertaining toy.
Machines powered by animals were mainly used in mills, for grinding grains.
This animation demonstrates how a turbojet engine works.
Inhabitants of the northern part of the Netherlands have successfully fought the sea since the Middle Ages.
Paper was invented more than two thousand years ago.
Thermal power stations convert energy released during the combustion of fossil fuels or renewable resources into electricity.
Threshing machines are used for separating grains from straw.
Two meshing gears transmit torque during their rotational motion.
Waterfalls form where a river flows over a steep precipice in its course.
The steam engine, perfected by the Scottish engineer James Watt, revolutionised technology.
Tidal power stations utilise the daily fluctuation of the water level for producing electricity.
The huge dam built on the Colorado river in the US was named after a former American President.
Wind power stations convert the kinetic energy of the wind into electricity.