Viruses

Viruses consist of protein and DNA or RNA; they reprogram infected cells to produce more viruses.

Simple harmonic motion and uniform circular motion

Simple harmonic motion can be considered to be the one-dimensional projection of uniform circular motion.

Villages

Villages were the first permanent human settlements

Rietveld Schröder House (Utrecht, 1924)

The Rietveld Schröder House, located in the town of Utrecht in the Netherlands, can be considered a forerunner of modern houses.

Boeing 747 (1969)

The Jumbo Jet is one of the best known airliners.

Burj Al Arab (Dubai, 1999)

Burj Al Arab, the world's only seven-star luxury hotel is located in the United Arab Emirates.

Western jackdaw

Groups of western jackdaws are frequently found in cities. Konrad Lorenz analysed the complex social behaviour of these animals.

Shadows

Change of light conditions in different seasons. Measuring height using shadows.

Saker falcon

The saker falcon is a large bird of prey widespread in Europe and and Asia.

Diamond

Crystalline allotrope of elemental carbon, the hardest known natural substance.

Medieval Arab torpedo (Hassan Al Rammah, 13th century)

The medieval Arab inventor, Hassan Al Rammah designed the world's first operating torpedo.

Graphite

One of the crystalline allotropes of elemental carbon.

Ötzi, the Iceman

The mummified body of a man who probably lived in the Chalcolithic period, was found in one of the glaciers of the Alps.

Junkers G 24 floatplane

A floatplane (sometimes called hydroplane) is an aircraft capable of taking off not only dry land, but water too.

Eiffel Tower (Paris, 1889)

The iron lattice tower, erected for the 1889 World Fair, became the symbol of the capital city of France.

Romanesque style Benedictine church (Ják, Hungary)

A Romanesque style Benedictine church with a special gateway, built in the 13th century in Hungary.

Junkers JU-52 (1932)

The most popular European-made transport aircraft before World War II.

Torsion balances

A force can be measured by measuring the twisting of the torsion wire in a torsion balance.

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