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One of the directors of the circular, open-air Renaissance theatre in London was William Shakespeare.
Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.
The structure and arrangement of polypeptide chains affects the spatial structure of proteins.
The geographic coordinate system enables every location on the Earth to be exactly specified.
Life magazine picked Gutenberg's invention of mechanical movable type printing as the most important event of the second millennium.
Located close to Osaka, the Japanese castle is also called the White Heron because of its white exterior.
The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.
Bottlenose dolphins are sea mammals which use ultrasound for orientation.
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 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.
A hydrothermal vent is a fissure in the planet's surface through which geothermally heated water erupts.
The eye is one of our most important sense organs. When stimulated by light, electric impulses are produced by its receptors.
The pancreas and the liver empty digestive juices into the duodenum.
Lymph vessels carry lymph to the blood vessels, while lymph nodes are integral parts of the immune system.
Eukaryotic cells contain a number of organelles.
The ribs, the sternum and the spinal column form the skeleton of the chest.