System that satisfies consumers’ demands of water supply, wastewater disposal, electricity, heat and gas supply and telecommunication.
Igloos were the typical dwellings built by Eskimos living in the Arctic zone.
The cockchafer (or maybug) is a widespread bug in Europe. Its larvae, known as chafer grubs are considered a pest.
The Aztec Empire was a despotic, militaristic state.
The Kepler space telescope was launched by NASA to discover Earth-like planets orbiting other stars
The fastest track-based means of urban transportation.
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.
This animation demonstrates the geographical locations of the Earth's major cities.
The battleship USS Missouri, first deployed during WWII was also deployed in the Gulf War.
Gladiators were combatants who entertained audiences in fights against each other or wild animals in ancient Roman arenas.
A species of venomous snakes widespread in Europe. Its bite is rarely fatal to humans.
Wind, as an external force, plays an important role in shaping coastal areas and steppes.
The Hypothalamic-pituitary axis is the regulating center of our endocrine system.
The Tesla Model S is one of the first commercially available electric cars.
Pollution is the negative effect of human activity on the natural environment.
This animation demonstrates the process of star development for average and massive stars.
An Ames room is a distorted room that is used to create an optical illusion.
It is a well-known phenomenon that the sound of an approaching sound source is higher than that of a receding one.
The Rosetta Stone helped to solve the mystery of hieroglyphics.
The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.