Robert Fulton American engineer created the first operational steam-powered ship.
Wind power stations convert the kinetic energy of the wind into electricity.
This animation presents the states and state capitals of Austria.
Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.
The name of the Russian armoured cruiser became well known during the October Revolution of 1917.
This animation demonstrates how an escalator works.
A group of fish characterised by a cartilaginous skeleton, well-known species include the great white shark and the great hammerhead shark.
Trolleybuses and trams are environment-friendly means of public transport
Emperor Franz Joseph I and the beautiful Elisabeth got married in Vienna in 1854, but their marriage was unfortunately an unhappy one.
The Arctic tern is famous for its long migration route: it flies from the Arctic to the Antarctic and back again each year.
This effective strategy was based on the fast and synchronised attack of different branches of the army.
Edison´s invention records and plays sound from a cylinder, while Berliner´s apparatus uses a disc.
Learning about the geographic location, capitals and flags of European countries through exercises in three levels of difficulty.
A type of sugar found in mammalian milk.
The medieval bell tower of the Cathedral of Pisa is the most famous leaning tower of the world.
The largest land mammal on Earth.
The warship having several rows of oars was the typical warship of the Hellenistic era.
A blood clot that forms in the deep veins of the lower limbs can cause a fatal pulmonary embolism if they enter the lungs.
The ancestors of Arachnida and Crustacea belonged to the class Trilobita.
This animation presents some interesting facts in social geography.