A phase transition is the change of a substance from one state of matter to another.
The first commercially successful technique of photography was invented by the French Louis Daguerre.
Evaporating surface water forms clouds of various shapes from which water falls back to the surface as precipitation.
This animation shows the electron configuration of the calcium atom.
The ancient Inca city, located in present-day Peru, is a World Heritage Site.
The steam engine, perfected by the Scottish engineer James Watt, revolutionised technology.
The first supersonic passenger airliner entered service in 1976.
The inner planets of the Solar System are terrestrial planets while the outer planets are gas giants.
Neurons transmit electrical signals via chemical and electrical synapses.
These great scientists had a tremendous impact on the advancement in physics.
Napoleon I, who crowned himself emperor, was one of the most outstanding military commanders in history.
These organs are vital for the survival and development of plants.
The liver is a vital organ that plays an important role in the digestion of fats, detoxification and metabolism.
The Code of Hammurabi is the emblem of the Mesopotamian civilisation; it contains 282 laws carved into a basalt stele.
Galileo Galilei's scientific achievements contributed greatly to the advancement of physics and astronomy.
The intriguing history of this historic castle spans nearly a thousand years.
Cereals are species of grasses cultivated for their edible grains.
In mountainous areas the climate, soil properties, the flora and fauna change depending on elevation.
This exciting and colourful game is designed to develop spatial perception. You can check your solutions using isometric views.
Rotating a geometric shape around a line within its geometric plane as an axis results in a solid of revolution.