The ear converts the vibrations of air into electric signals which are then processed by the brain.
This animation demonstrates how the Earth and the Moon were formed.
The apparent movement of the Sun is caused by the Earth's rotation around its axis.
This animation demonstrates different types of volcanic eruptions.
This animation demonstrates the type of engine most commonly used in cars.
This animation introduces the most important organ systems of the human body.
The round tower of the largest fort in the Arabian Peninsula had an ingenious defense system.
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.
This animation presents the formulas to calculate the perimeter and area of shapes as well as the surface area and volume of solids.
The world's most famous citadel, the Acropolis of Athens was built in the 5th century B.C., during the Age of Pericles.
The most famous and most magnificent amphitheater of Rome was built in the 1st century.
The desalination process produces drinking water from seawater.
Large carnivores, perhaps the best known of dinosaurs.
Visit the workshop of the Renaissance polymath and his most influential inventions and works of art.
The name of this magnificent palace complex originates in Arabic and means 'the red one'.
The Moon is the Earth's only natural satellite
A metropolis is a large city with a population of over 1 million people.
The first dwellings in human history provide a lot of information about the lifestyle of our ancestors.
The vacuum cleaner creates a partial vacuum and sucks up dust with the help of the incoming high-pressure air.
This 3D scene presents the steps of the cement manufacturing process.