Alfred Nobel invented dynamite. He obtained a large fortune from the development of dynamite and the other explosives. He made a lot of money from oil fields. He left the money to give Nobel Prizes.
Isaac Newton, one of the greatest scientists that ever lived is best known for his ideas on gravity. Once he was sitting under a tree. when an apple fell on him. He thought that some force must have pulled the apple towards ground. He called this force of gravity.
John Logie Baird was the inventor of mechanical television making his first public demonstration on March 25, 1925. However, Paul Nipkow of Germany developed a rotating-disc technology to transmit picture over wire in 1884.
To combat humidity inside a printing press. Willies Carrier built the first air-conditioner in 1902.
Wilhelm Conrad Roentgen was a German scientist who made one of the most useful discoveries of the 20th century- the x-ray.
The oldest non-electric vacuum cleaner in the world whirlwind was invented in 1869 by Ives W.McGaffey. But the first electric vacuum cleaner that used both a cloth filter bag and cleaning attachments was built by the Hoover Company of New Berlin. Ohio in 1908. This was invented by James M.Spangler.
Albert Einstein was one of the greatest scientists of all times. Computers and space travel, without his theories, may never have been developed. He was honoured with the Nobel Prize in the year 1922.