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Napoleon I, who crowned himself Emperor of the French, was one of the most outstanding military commanders in history.
The apparent movement of the Sun is caused by the Earth's rotation around its axis.
Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.
The life cycle of vertebrates starts with the production of the reproductive cells of an individual and ends with the production of the reproductive cells of the next generation.
Majestic even in its ruins, this city was the largest and most populous settlement in the pre-Columbian Americas.
Seawater, as an external force, plays an important role in shaping coastlines.
Marie Curie, the only person to win the Nobel Prize in two different sciences, is probably the most famous woman in the history of science.
These organs are vital for the survival and development of plants.
These great scientists had a tremendous impact on the advancement in physics.
This animation presents the formulas to calculate the perimeter and area of shapes as well as the surface area and volume of solids.
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.
Wind, as an external force, plays an important role in shaping deserts.
In mountainous areas the climate, soil properties, the flora and fauna change depending on elevation.
This scene presents the main administrative divisions of Bulgaria.
This animation presents some animals and plants that lived between the Devonian and Permian periods (358–299 million years ago).
The liver is a vital organ that plays an important role in the digestion of fats, detoxification and metabolism.
The fortress-like palace was built by Roman Emperor Diocletian on the coast near his home town.