Evaporating surface water forms clouds of various shapes from which water falls back to the surface as precipitation.
This animation compares the life cycles of mosses and ferns, helping to understand the general life cycle of plants.
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.
This animation shows the electron configuration of the calcium atom.
The ancient Inca city, located in present-day Peru, is a World Heritage Site.
3-dimensional Cartesian coordinate system with illustrations and exercises that develop spatial perception.
The Giza Necropolis is the only one of the Ancient wonders still intact.
Commercial maritime routes of container ships form a global network.
The inner planets of the Solar System are terrestrial planets while the outer planets are gas giants.
The Code of Hammurabi is the emblem of the Mesopotamian civilisation; it contains 282 laws carved into a basalt stele.
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.
The liver is a vital organ that plays an important role in the digestion of fats, detoxification and metabolism.
Neurons transmit electrical signals via chemical and electrical synapses.
Galileo Galilei's scientific achievements contributed greatly to the advancement of physics and astronomy.
The Great ocean conveyor is a planet-wide system of ocean currents, which has a great influence on the Earth´s climate.
This animation demonstrates the fine molecular structure and mechanism of muscles.