Navigational instruments of the past

Several ingenious instruments have been invented over the centuries to help in navigating the seas.

The human blood

Human blood consists of blood cells and plasma.

Wright Flyer I (1903)

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

Organisation of genetic material

Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.

DNA

Carrier of genetic information in cells.

The development of lakes

Standing bodies of water can form in depressions on the surface by both endogenic and exogenic forces, as well as by human activity.

Circulatory system

Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.

Icebergs

Icebergs are blocks of frozen freshwater floating in the sea.

Neolithic settlements

As a result of the revolutionary advances in the Neolithic, settling human communities established the first lasting settlements.

Medieval inhabited bridge (London Bridge, 16th century)

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

Egyptian Pyramids (Giza, 26th century BC)

The Giza Necropolis is the only one of the Ancient wonders still intact.

Domestic electric light sources

This animation shows the characteristics of domestic light sources, from traditional light bulbs to LED lights.

The Sun's path above the major circles of latitude

The apparent movement of the Sun is caused by the Earth's rotation around its axis.

Globe Theatre (London, 17th century)

One of the directors of the circular, open-air Renaissance theatre in London was William Shakespeare.

How does it work? - Loudspeaker

In loudspeakers sound waves are generated by electromagnetic induction.

Liuhe Pagoda (Hangzhou, 12th century)

The Buddhist pagoda of the six Harmonies is located in China, by the River Qiantang.

Types of bone articulations

Human bones are joined together by cartilaginous or synovial joints, sutures or they can fuse together.

Cereals

Cereals are species of grasses cultivated for their edible grains.

Syrian water wheels (City of Hama, 13th century)

Medieval Syrian water wheels were used to convey water to distant areas.

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