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THE GREAT NEWTON

Born in england, Isaac Newton (1642-1727) was one of the greatest scientist. His greatest achivement was his discovery of gravity and three fundamental laws of motion which he descirbed in his famous book published in 1687,philosophiae naturalis principia mathematica.-'The Mathematical Princeples of Natural Philosophy - usually called just The Principia.But he made many other important discoveries including the fact that white light is mixture of all colours he found that by shining it through a prism (wedge of glass)white light could be split into a spectrum -an array of all seven colours He also invented the mirror telescope to prevent cloured edges on the image. this design is still used in manufacturing many modern telescopes.

THE FIRST WRITTING

We have learned a lot about people of long ago from their writtings.The first people to write things down were the summerians.They used picture signs.People in different parts of the world invented their own pictur sign.On the right you can see a kind of picture writting used by the priests of ancient egypt.