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Spider silk, spider web

While the density of spider silk is less than that of nylon filaments, its tensile strength is greater than that of steel.

Typical dwelling types

Every era and every culture has specific residential buildings.

Magnetron

One of the most important components of the microwave oven is the magnetron, which produces the microwaves.

How do geckos' feet adhere to smooth surfaces?

Geckos can walk on walls or even ceilings. The 3D scene explains this ability.

Long-tailed mayfly

Larvae of this type of mayflies spend the first three years of their lives in water, their adult lives last for only one day which they use for mating.

Forces

The animation shows the way forces act on wheeled vehicles and vehicles with runners.

Niche

In ecology, a niche is a term describing the way of life of a species.

Radioactivity

The process of the decay of unstable nuclei is called radioactivity.

Hierarchy of the Medieval Christian church (11th century)

This animation shows the hierarchical structure of the Medieval Christian church.

Jameh Mosque (Isfahan, 15th century)

Its architectural solutions and ornamentation rank this mosque among the masterpieces of Islamic art.

Cylindrical solids

This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.

Teatro Olimpico (Vicenza, 16th century)

The first indoor theatre in modern history to be constructed according to the theatre-building codes of Antiquity was inaugurated in 1585.

B-17 Flying Fortress (USA, 1938)

The ´Flying Fortress´ was developed for the United States Army Air Force by Boeing

Pearls

Pearls, often used as gemstones, are the by-products of certain molluscs' protective mechanisms.

Vertebrate brain evolution

During the evolution of vertebrates the relative development of brain areas has changed.

Ancient agriculture in the Nile Valley

Ancient Egypt was called the ‘gift of the Nile’, since the river played an important role in the rise of Egyptian civilisation.

AH-64 Apache (USA, 1975)

The Apache attack helicopter, named after an American Indian tribe, was developed for the United States Army.

Trench network (World War I)

Static warfare was one of the characteristics of WWI

Calcium carbonate (CaCO₃)

Limestone is a widely and diversely used material.

Chlorination of methane by a substitution reaction

During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.

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