The International Space Station is a habitable satellite built with the cooperation of 16 countries.
The ´Temple of all gods´ was built during the reign of the Roman Emperor Hadrian.
This bizarre-looking fish uses its bioluminescent lure to catch its prey. The animation explains how it works.
Human blood consists of blood cells and plasma.
Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.
Vertical forces can break up layers of rock into fault blocks, which then move vertically along the fracture planes.
Tectonic plates can move in relation to each other.
Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.
The rise and drop of sea levels caused by the gravitational force of the Moon.
Carbon is bound in organic substances during photosynthesis, while during breathing, it is released into the atmosphere.
Dry land on the surface of Earth is divided into continents which are separated by oceans.
This animation demonstrates the development of the human embryo and foetus.
The ancient Roman arena became well-known for the chariot races held here.
The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.
Certain mushrooms are poisonous and can be fatal for humans when consumed, while others are edible and used widely in cooking.
Typical settlements of the Norsemen were not only established in Scandinavia, they appeared on distant areas as well.
When the Sun, Earth, and the Moon are arranged in a straight line, the Moon can partially or completely obscure the Sun.
The magnificent capital of the Aztec Empire astonished even the Spanish Conquistadors.
The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.
Soviet labour camps (Gulags) were located far from inhabited areas.