The largest bronze-age building complex of ancient Crete was probably the centre of Minoan civilisation.
A wooden church built in the 12th-13th centuries, the best preserved of Norway´s stave churches.
A hydrothermal vent is a fissure in the planet's surface through which geothermally heated water erupts.
The atomic bomb is one of the most destructive weapons in human history.
River locks make rivers with great level differences safe for boating.
The apparent movement of the Sun is caused by the Earth's rotation around its axis.
A type of steam locomotives used by British Railways were manufactured in the 1950s.
Designated as the first National Treasure of South Korea, the Namdaemun was one of the major gateways of Seoul's Medieval city walls.
A dynamo converts mechanical energy into direct current.
The difference between the temperature of the polar and equatorial zones causes atmospheric circulation which is affected by a number of factors, including...
This animation demonstrates the functioning of the 3 basic types of water tap.
This animation introduces the most important systems of the human body.
Bottlenose dolphins are sea mammals which use ultrasound for orientation.
Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
Located close to Osaka, the Japanese castle is also called the White Heron because of its white exterior.
The primary duty of these Japanese warriors was to serve their feudal lords, even at the cost of their own lives.
Space probes and Mars rovers examine the structure of Mars and possible traces of life.
Bacteria occur in a wide range of shapes, including spheres, rods and spirals.
The ribs, the sternum and the spinal column form the skeleton of the chest.
Eukaryotic cells contain a number of organelles.