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One of the most modern means of transport is the Maglev, capable of travelling at speeds of over 400 km/h.
The American inventor presented his invention revolutionising telecommunication at New York University in 1837.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
The device that transmits human voice as electrical signals was invented by Bell in 1876.
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.
This animation demonstrates geometric reflection, a type of geometric transformation both in plane and space.
In transmission systems, the engine torque is modified by reducing or increasing rotational speed.
Stratovolcanoes consist of layers of volcanic ash, debris and lava.
A Zeppelin is a type of rigid-framed airship.
The American electrical engineer Edison invented the incandescent light bulb in 1879, which changed our everyday life.
Chess games can help to develop logic skills.
This animation shows the symptoms and treatment of secretory otitis media.
A spectacular demonstration of algebraic expressions.
This animation demonstrates the structure and operation of hair dryers.
Mitosis is the process by which a eukaryotic cell divides into two cells and the number of chromosomes remains unchanged.
Hotspots are areas of the Earth´s crust where magma often rises to the surface and causes volcanic activity.
A type of large freshwater crayfish widespread in Europe.
The Earth’s magnetic North and South poles are located near the geographic North and South poles.
An average Egyptian dwelling consisted of regularly arranged rooms.
The ´Temple of all gods´ was built during the reign of the Roman Emperor Hadrian.