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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.
The animation demonstrates the most important types of feathers and their fine structure.
Every era and every culture has specific residential buildings.
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 the components (vertices, edges, diagonals and faces) of the cube, one of the Platonic solids.
The purpose of the electricity supply network is to provide electricity for consumers.
The Space Shuttle was a manned, reusable spacecraft operated by NASA.
The Channel Tunnel is a 50.5 km long railway tunnel between the United Kingdom and France, beneath the English Channel.
In alkaline batteries electric current is generated by electrochemical reactions
DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.
The products of oil refining include diesel oil, petrol and lubricants.
The ancestors of Arachnida and Crustacea belonged to the class Trilobita.
This animation demonstrates instruments used to examine atmospheric phenomena.
An important endocrine gland producing hormones that affect metabolism and the calcium balance of the body.