The step pyramid, built in the 27th century BC, was the first pyramid in Egypt.
Comets are spectacular celestial bodies orbiting the Sun.
The position and acceleration of the head is detected by the inner ear.
Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.
Life magazine picked Gutenberg's invention of mechanical movable type printing as the most important event of the second millennium.
Soviet labour camps (Gulags) were located far from inhabited areas.
Candles have been used for lighting since ancient times.
The double-decked, wide-bodied passenger aircraft can carry more then 500 passengers.
This animation demonstrates the anatomy of spiders through the example of a common European species.
This animation demonstrates the structure and operation of electron microscopes.
This animation demonstrates the development of the axe throughout archaeological periods.
Human bones are joined together by cartilaginous or synovial joints, sutures or they can fuse together.
The English engineer George Stephenson’s locomotive was built for a competition of locomotives in 1829.
This animation introduces body parts on a male anatomical model.
This animation introduces the studies of astronomers and physicists whose works fundamentally changed our view of the universe.
Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.
The magnificent capital of the Aztec Empire astonished even the Spanish Conquistadors.
Typical settlements of the Norsemen were not only established in Scandinavia, they appeared on distant areas as well.
The 900 years old Benedictine abbey is situated in Melk, on the right bank of the Danube.
Several ingenious instruments have been invented over the centuries to help in navigating the seas.