This animation presents some animals and plants that lived between the Devonian and Permian periods (358–299 million years ago).
The position and acceleration of the head is detected by the inner ear.
The double-decked, wide-bodied passenger aircraft can carry more then 500 passengers.
The heart generates the electrical impulses necessary for its own operation. The graphic representation of the electrical activity of the heart is the...
This animation demonstrates the structure and operation of electron microscopes.
Chess games can help to develop logic skills.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
The ancient Roman arena became well-known for the chariot races held here.
The theatre that has a distinctive shape and excellent acoustics was situated at the side of the Acropolis in Athens.
In mountainous areas the climate, soil properties, the flora and fauna change depending on elevation.
The intriguing history of this historic castle spans nearly a thousand years.
Cannons also appeared in naval warfare.
Several ingenious instruments have been invented over the centuries to help in navigating the seas.
This animation demonstrates the parts of the head, the torso and the limbs.
Short-lived but extremely powerful tornadoes can cause a great deal of damage.
Space probes and Mars rovers examine the structure of Mars and possible traces of life.
Human bones are joined together by cartilaginous or synovial joints, sutures or they can fuse together.
The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.
Neil Armstrong, one of the crew members of Apollo 11 was the first man to set foot on the Moon.
The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.