A series of fortifications built to prevent incursions from northern nomadic groups.
This Pacific island is famous for its unique monolithic human figures.
The seminomadic lifestyle of the Bedouin adapted to the climatic and environmental conditions of the desert.
This animation demonstrates the structure and operation of CT scanners.
This animation presents the main types of leaves and the differences between monocot and dicot leaves.
This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.
The Doric, Ionic and Corinthian order of columns are different in size and ornamentation as well.
The Benz Patent-Motorwagen is widely regarded as the first vehicle propelled by an internal combustion engine.
Matter is made up by quarks and leptons, while interactions are carried by bosons.
The largest bronze-age building complex of ancient Crete was probably the centre of Minoan civilisation.
A mushroom is the fleshy fruiting body of a fungus, made up from hyphae.
The excellent road and aqueduct system covering the whole empire reflects well the development of the Roman civilisation.
Yuri Gagarin became the first human in space on 12 April 1961.
According to Homer’s epic, Odysseus’ Stratagem caused the loss of Troy.
The heart generates the electrical impulses necessary for its own operation. The graphic representation of the electrical activity of the heart is the...
A Zeppelin is a type of rigid-framed airship.
The legendary city of the Mayan-Toltec Empire was located on the territory of present-day Mexico.
A demonstration of nearby planets, stars and galaxies.
Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.
These Palaeolithic statuettes probably symbolise fertility and prosperity.