System of public utilities

System that satisfies consumers’ demands of water supply, wastewater disposal, electricity, heat and gas supply and telecommunication.

Traditional Eskimo lifestyle

Igloos were the typical dwellings built by Eskimos living in the Arctic zone.

Cockchafer (Maybug)

The cockchafer (or maybug) is a widespread bug in Europe. Its larvae, known as chafer grubs are considered a pest.

Aztec ruler (15th century)

The Aztec Empire was a despotic, militaristic state.

Kepler space telescope

The Kepler space telescope was launched by NASA to discover Earth-like planets orbiting other stars

Subway

The fastest track-based means of urban transportation.

Dodo

The dodo is an extinct species of birds that used to be native to the island of Mauritius. It has become the symbol of extinction.

Cities of the world

This animation demonstrates the geographical locations of the Earth's major cities.

USS Missouri (US, 1944)

The battleship USS Missouri, first deployed during WWII was also deployed in the Gulf War.

Roman gladiators (2nd century)

Gladiators were combatants who entertained audiences in fights against each other or wild animals in ancient Roman arenas.

Common European viper

A species of venomous snakes widespread in Europe. Its bite is rarely fatal to humans.

Aeolian landforms on coasts and steppes

Wind, as an external force, plays an important role in shaping coastal areas and steppes.

Hypothalamic-pituitary axis

The Hypothalamic-pituitary axis is the regulating center of our endocrine system.

Electric car

The Tesla Model S is one of the first commercially available electric cars.

Pollution

Pollution is the negative effect of human activity on the natural environment.

Types of stars

This animation demonstrates the process of star development for average and massive stars.

Ames room

An Ames room is a distorted room that is used to create an optical illusion.

The Doppler effect

It is a well-known phenomenon that the sound of an approaching sound source is higher than that of a receding one.

Rosetta Stone

The Rosetta Stone helped to solve the mystery of hieroglyphics.

p-V-T diagram for ideal gases

The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.

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