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This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.
The first commercially successful technique of photography was invented by the French Louis Daguerre.
A phase transition is the change of a substance from one state of matter to another.
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.
One of the directors of the circular, open-air Renaissance theatre in London was William Shakespeare.
Practice the Hungarian alphabet and form words from the letters.
The steam engine, perfected by the Scottish engineer James Watt, revolutionised technology.
The liver is a vital organ that plays an important role in the digestion of fats, detoxification and metabolism.
The Great ocean conveyor is a planet-wide system of ocean currents, which has a great influence on the Earth´s climate.
Cereals are species of grasses cultivated for their edible grains.
Wind, as an external force, plays an important role in shaping deserts.
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.
African villages adapt to the natural environment well and reflect of the culture of local tribes.
Our body´s internal support structure to which skeletal muscles are attached.
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.