RMS Titanic was the largest passenger ship at the beginning of the 20th century.
The Internet allows us to send data quickly to large distances.
The first supersonic passenger airliner entered service in 1976.
Located close to Osaka, the Japanese castle is also called the White Heron because of its white exterior.
A dynamo converts mechanical energy into direct current.
The Earth is composed of several spherical layers.
The orbits of the 8 planets in our Solar System are elliptical.
Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.
The inflammation of the vermiform appendix, which is connected to the cecum, requires immediate surgical intervention. The animation shows the cause and...
The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.
Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.
Life magazine picked Gutenberg's invention of mechanical movable type printing as the most important event of the second millennium.
Neil Armstrong, one of the crew members of Apollo 11 was the first man to set foot on the Moon.
The geographic coordinate system enables every location on the Earth to be exactly specified.
The difference between the temperature of the polar and equatorial zones causes atmospheric circulation which is affected by a number of factors, including...
The ribs, the sternum and the spinal column form the skeleton of the chest.
Bacteria occur in a wide range of shapes, including spheres, rods and spirals.
The primary duty of these Japanese warriors was to serve their feudal lords, even at the cost of their own lives.
Eukaryotic cells contain a number of organelles.
Lymph vessels carry lymph to the blood vessels, while lymph nodes are integral parts of the immune system.