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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.

Types of feathers

The animation demonstrates the most important types of feathers and their fine structure.

Typical dwelling types

Every era and every culture has specific residential buildings.

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.

Cube

This animation demonstrates the components (vertices, edges, diagonals and faces) of the cube, one of the Platonic solids.

Electricity supply network

The purpose of the electricity supply network is to provide electricity for consumers.

Space Shuttle

The Space Shuttle was a manned, reusable spacecraft operated by NASA.

The Channel Tunnel

The Channel Tunnel is a 50.5 km long railway tunnel between the United Kingdom and France, beneath the English Channel.

Alkaline batteries

In alkaline batteries electric current is generated by electrochemical reactions

DC motor

DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.

Oil refinery

The products of oil refining include diesel oil, petrol and lubricants.

Trilobites

The ancestors of Arachnida and Crustacea belonged to the class Trilobita.

Meteorological instruments

This animation demonstrates instruments used to examine atmospheric phenomena.

Thyroid gland

An important endocrine gland producing hormones that affect metabolism and the calcium balance of the body.

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