The mechanism of vision

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.

How does it work? - Turbojet

This animation demonstrates how a turbojet engine works.

How does it work? - Water tap

This animation demonstrates the functioning of the 3 basic types of water tap.

Macedonian siege tower (4th century BC)

The army of Alexander the Great successfully deployed siege towers in its attacks against fortifications.

Concorde (1969)

The first supersonic passenger airliner entered service in 1976.

Wright Flyer I (1903)

The Wright Flyer was the first successful powered, heavier-than-air aircraft, designed and built by the Wright brothers.

Ancient Roman aqueduct and road

The excellent road and aqueduct system covering the whole empire reflects well the development of the Roman civilisation.

Daguerreotype

The first commercially successful technique of photography was invented by the French Louis Daguerre.

Nervous system

The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.

The Cassini-Huygens Mission (1997-2017)

The Cassini spacecraft was exploring Saturn and its moons for nearly 20 years.

Container ships

Commercial maritime routes of container ships form a global network.

Roman snail

A widespread snail species, also popular as food.

The White House (Washington, DC, 1800)

One of the best known buildings in the world, this is the residence and office of the President of the United States.

Nose, the mechanism of smelling

Olfactory receptors produce electric signals when stimulated by odours.

Taj Mahal (Agra, 17th century)

The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.

Medieval inhabited bridge (London Bridge, 16th century)

In the Tudor Era around 200 buildings were built on the bridge across the River Thames.

Voice production

When producing sound, the vocal cords are vibrated by the air flowing out of the lung.

Observatory

Observatories are often built at high elevations to minimise the effects of atmospheric turbulence

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