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Johannes Gutenberg is a German inventor who is known as one of the mostt important contributors to the history of the world. Gutenberg's invention of printing is one of the biggest in history. It helped people to spread the knoweledge that had belonged to a few people for hundreds of years. His most important contribution was the printing of the Bible in 1455, which was the starting of book printing in Europe.

Alfred Bernhard Nobel was a Swedish inventor and engineer who got 355 patents in his life. He is best known for inventing dynamite. Nobel was one of the richest persons of the world and a peace lover at heart. He did not want to be remembered as the reason behind people's deaths. So he left his money for the international prize fund. Nobel prizes are now awarded for achievements in five different fields to people of different countries and nationalities.

Erno Rubik is a Hungarian inventor, architect, and professor of architecture. He was born on 13 July 1944. He is best known for the invention of mechanical puzzles including Rubik's Cube in 1974. It is the most popular toy of all time. It took Rubik himself over a month to find the solution to the work of his cube. Now Rubik continues to work in the field of education, much of his work is connected with the role of science in education.

Samuel Morse was an American painter and inventor. Morse started his career as a painter. It was the sudden death of his wife that was the starting point of his work in the field of long distance communication. He came up with the telegraph system that changed the way people sent and got messages. He developed the Morse Code, a method of sending text information as a series of tones which is still in use in radio communications.

Thomas Alva Edison is a great name in the scientific and technological world. It was his knoweledge, ideas and hard work that helped him to play the leading role in America's first technological revolution. It is his discoveries and inventions that made life better for the people in the world. Edoson had about 1,093 patents, among his many inventions are the phonograph, the first practical electric light bulb, the motion picture camera, the battery for an electric car.

Sir Tim Berners-Lee is a British computer scientist who made one of the most revolutionary inventions of the 20 th century - THe World Wide Web. He graduated from the University of Oxford. Working as a software engineer he realized the need for a global communication network. He came up with the idea of a global network and the world's firts web browser. It is not surprising his idea has changed out life forever.

Anders Celsius was a Swedish astronomer, physicist. and mathematician. Ahders showed an extraordinary talent for mathematics and became an astronomer. He started a lot of projects but died unexpectedly before he could finish them. He is most famous for the invention of the temperature scale which is based on the boiling and freezing points of water. We remember hin when we gall ill and want to know if we have a fever.