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Uranus is the 7th planet from the Sun, a gas giant.
During the evolution of vertebrates the relative development of brain areas has changed.
Concave and convex lenses are used for the correction of short-sightedness and far-sightedness.
Pearls, often used as gemstones, are the by-products of certain molluscs' protective mechanisms.
Venus is the 2nd planet from the Sun, the brightest object on the night sky (after the Moon).
Trolleybuses and trams are environment-friendly means of public transport
A group of fish characterised by a cartilaginous skeleton, well-known species include the great white shark and the great hammerhead shark.
The American Civil War was fought between the Confederacy and the Union.
Colourless, odourless liquid produced by dissolving carbon dioxide in water.
The German engineer Otto Lilienthal was the first person to make successful flights with a glider designed by himself.
The changing bicycle, at first mocked as a toy, is a true mirror of the technical development over the last three centuries.
Building 3D shapes into a given cube mesh with the help of several views.
Long-necked herbivorous dinosaur with a robust body.
Edison´s invention records and plays sound from a cylinder, while Berliner´s apparatus uses a disc.
Ziggurats were typical terraced step pyramids used as temples in ancient Mesopotamia.
The animation presents the main air, water and land routes and transport hubs.
The limbic system plays an important role in forming emotions and in learning.
The phalanx formation was a military formation of the Greek heavy infantry.
A variety of peripherals can be used with laptop computers.
The best-known piece of the Hungarian Crown Jewels is the Holy Crown.