A dynamo converts mechanical energy into electric energy.
Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.
The structure and arrangement of polypeptide chains affects the spatial structure of proteins.
3-dimensional Cartesian coordinate system with illustrations and exercises that develop spatial perception.
The ancient Inca city, located in present-day Peru, is a World Heritage Site.
Evaporating surface water forms clouds of various shapes from which water falls back to the surface as precipitation.
This animation demonstrates geometric rotation, a type of geometric transformation both in plane and space.
This animation demonstrates geometric translation in both plane and space.
This animation demonstrates geometric reflection, a type of geometric transformation both in plane and space.
The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.
Certain mushrooms are poisonous and can be fatal for humans when consumed, while others are edible and used widely in cooking.
The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.
The step pyramid, built in the 27th century BC, was the first pyramid in Egypt.
Today only one of the Wonders of the Ancient World is still intact: the Pyramids of Giza.
In the Tudor Era around 200 buildings were built on the bridge across the River Thames.
The Parisian prison became legendary after the Revolution of 1789.
The position and acceleration of the head is detected by the inner ear.
The double-decked, wide-bodied passenger aircraft can carry more then 500 passengers.
This animation demonstrates the structure and operation of electron microscopes.
Nuclear fusion will serve as an environmentally friendly and practically unlimited source of energy.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
The ancient Roman arena became well-known for the chariot races held here.