The Olympic Games, held in the town every 4th year after 776 BC made it one of the centres of ancient Greece.
In alkaline batteries electric current is generated by electrochemical reactions
DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.
An important endocrine gland producing hormones that affect metabolism and the calcium balance of the body.
An entertaining game about different views of spatial objects.
Ancient Roman conquerors had effective siege engines developed for attacking fortifications.
Ziggurats were typical terraced step pyramids used as temples in ancient Mesopotamia.
Fatty acid molecules consist of a polar head and a non-polar tail, therefore they are suitable for removing fat stains.
Large-scale ammonia production requires high temperature and pressure and the presence of iron as a catalyst.
The limbic system plays an important role in forming emotions and in learning.
Pearls, often used as gemstones, are the by-products of certain molluscs' protective mechanisms.
Addition is a reaction in which the molecules of two or more substances unite without the formation of a by-product.
During the evolution of vertebrates the relative development of brain areas has changed.
Ancient Egypt was called the ‘gift of the Nile’, since the river played an important role in the rise of Egyptian civilisation.
The Apache attack helicopter, named after an American Indian tribe, was developed for the United States Army.
Limestone is a widely and diversely used material.
During the substitution reaction the hydrogen atoms of methane are substituted with chlorine atoms, the by-product is hydrogen chloride.
Hydrogen atoms within hydrogen molecules are held together by a covalent bond.
These excellent shipbuilders and sailors travelled great distances on the seas and rivers.
Static warfare was one of the characteristics of WWI