Machines powered by animals were mainly used in mills, for grinding grains.
This Neoclassical structure is one of the best-known landmarks of Berlin and Germany.
Modern Slavs live in 14 European countries that can be classified into 3 groups.
The Kepler space telescope was launched by NASA to discover Earth-like planets orbiting other stars
The V-1 flying bomb was an early pulse-jet-powered cruise missile developed in Nazi Germany and deployed in WWII.
This animation demonstrates the process of star development for average and massive stars.
The Tesla Model S is one of the first commercially available electric cars.
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.
Wind, as an external force, plays an important role in shaping coastal areas and steppes.
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.
A geisha is a traditional Japanese entertainer whose skills include performing classical music and dance.
The architecture of traditional Samoan family settlements reflect the unique culture of their inhabitants.
The Vought F4U Corsair radial-engined naval fighter was one of the most prominent American aircraft of the Second World War.
This animation demonstrates how muscles and vertebrae move the head.
Radial engines are used primarily in aeroplanes and helicopters.
This animation presents levels of biological organisation from the level of the individual organism to the level of cells.
Adrenaline, also known as epinephrine, is a hormone produced in our body in stressful situations and plays an important role in the fight-or-flight response.
The dromedary is an indispensable animal for inhabitants of the deserts.
The inability to differentiate certain shades of colour is called colour vision deficiency.