Extinct proboscidea closely related to today's elephants, often hunted by prehistoric man.
The ancestors of Arachnida and Crustacea belonged to the class Trilobita.
Wind power stations convert the kinetic energy of the wind into electricity.
Robert Fulton American engineer created the first operational steam-powered ship.
The German triplane was perhaps the best known plane in World War I.
The Arctic tern is famous for its long migration route: it flies from the Arctic to the Antarctic and back again each year.
Schooners, first built in the Netherlands in the 17th century, were mainly used as merchant ships.
From the 1940s, the increasingly large aircraft carriers became the masters of the oceans.
This animation presents the states and state capitals of Austria.
Nuclear propulsion was first used by the US Navy for powering submarines in the mid-20th century.
A bireme is a type of ancient warship, with a characteristic pointed bow and two decks of oars, used by many armies.
A blood clot that forms in the deep veins of the lower limbs can cause a fatal pulmonary embolism if they enter the lungs.
Several analogous types of eyes have developed independently through convergent evolution.
The American Civil War was fought between the Confederacy and the Union.
Edison´s invention records and plays sound from a cylinder, while Berliner´s apparatus uses a disc.
The largest land mammal on Earth.
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.
This animation presents some interesting facts in social geography.
Emperor Franz Joseph I and the beautiful Elisabeth got married in Vienna in 1854, but their marriage was unfortunately an unhappy one.