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Pollution is the detrimental effect of human activity on the natural environment.
The ear converts the vibrations of air into electric signals which are then processed by the brain.
Neil Armstrong, one of the crew members of Apollo 11 was the first man to set foot on the Moon.
Large carnivores, perhaps the best known of dinosaurs.
This animation demonstrates the type of engine most commonly used in cars.
This animation introduces the most important organ systems of the human body.
This animation presents the formulas to calculate the perimeter and area of shapes as well as the surface area and volume of solids.
This animation demonstrates how the Earth and the Moon were formed.
This animation demonstrates different types of volcanic eruptions
The most famous and most magnificent amphitheatre of Rome was built in the 1st century.
The world's most famous citadel, the Acropolis of Athens was built in the 5th century BC, during the Age of Pericles.
The desalination process produces drinking water from seawater.
The church of the 'Holy Wisdom', built in the Byzantine Empire, had been one of the largest religious buildings until 1935, when it was converted into a museum.
The round tower of the largest fort in the Arabian Peninsula had an ingenious defence system.
This animation presents some interesting facts in physical geography.
Visit the workshop of the Renaissance polymath and his most influential inventions and works of art.
The Forbidden City is one of the most magnificent and mysterious monuments of imperial China.
James Cook's legendary journey around the world proved to be enormously valuable for science.
The Bell X-1 was the first manned aircraft to exceed the speed of sound in level flight.
Banana is one of the most commonly consumed fruits in the world.