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While the density of spider silk is less than that of nylon filaments, its tensile strength is greater than that of steel.
Every era and every culture has specific residential buildings.
One of the most important components of the microwave oven is the magnetron, which produces the microwaves.
Geckos can walk on walls or even ceilings. The 3D scene explains this ability.
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.
The animation shows the way forces act on wheeled vehicles and vehicles with runners.
In ecology, a niche is a term describing the way of life of a species.
The process of the decay of unstable nuclei is called radioactivity.
This animation shows the hierarchical structure of the Medieval Christian church.
Its architectural solutions and ornamentation rank this mosque among the masterpieces of Islamic art.
This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.
The first indoor theatre in modern history to be constructed according to the theatre-building codes of Antiquity was inaugurated in 1585.
The ´Flying Fortress´ was developed for the United States Army Air Force by Boeing
Pearls, often used as gemstones, are the by-products of certain molluscs' protective mechanisms.
During the evolution of vertebrates the relative development of brain areas has changed.
Ancient Egypt was called the ‘gift of the Nile’, since the river played an important role in the rise of Egyptian civilisation.
The Apache attack helicopter, named after an American Indian tribe, was developed for the United States Army.
Static warfare was one of the characteristics of WWI
Limestone is a widely and diversely used material.
During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.