A fuel cell provides environment-friendly electric energy produced by the chemical reaction between oxygen and hydrogen.
Colorless, moderate acid, only known in aqueous solution.
This animation explains the technology of shale gas extraction.
Concave and convex lenses are used for the correction of shortsightedness and farsightedness.
Robert Fulton American engineer created the first operational steam-powered ship.
The colonizing powers´ colors were wiped off the map by the nations fighting to regain their independence.
A bireme is a type of ancient warship, with a characteristic pointed bow and two decks of oars, used by many armies.
One of the greatest archeological finds of the 20th century was the tomb of the Egyptian pharaoh.
The fat-tailed scorpion is one of the world's most dangerous scorpions.
The German triplane was perhaps the best known plane in World War I.
Schooners, first built in the Netherlands in the 17th century, were mainly used as merchant ships.
The marathon running event was instituted in commemoration of the run of a Greek soldier after the Battle of Marathon, fought between the Athenian and the...
One of the largest marsupials.
The aircraft manufactured by the British de Haviland company was the world's first mass-produced commercial jetliner.
The products of oil refining include diesel oil, petrol and lubricants.
The Earth's continents have been in constant motion during the history of the planet.
From the 1940s, the increasingly large aircraft carriers became the masters of the oceans.
The Voyager space probes were the first man-made objects to leave the Solar System. They gather data about outer space and carry information about humanity.
The face-centered cubic metal lattice allows the closest fit of metal atoms.
Raw iron is produced from iron ore in iron smelters.