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    Mehmed II, The Conqueror  
Mehmed II (1432-1481), nicknamed the conqueror, was the sultan of the Ottoman Empire a short time in 1444 to 1446, and from 1451 to 1481. Mehmed II brought an end to the Byzantine Empire by capturing Constantinople in 1453 (during the well-...
 
    John Harrison, Solved Longitude - 1773  
John Harrison was a self-educated English carpenter and clockmaker. He invented the marine chronometer, a long-sought after device for solving the problem of establishing the East-West position or longitude of a ship at sea, thus revolution...
 
    Röntgen, Discovers X-rays, 1895  
Wilhelm Conrad Röntgen was a German physicist, of the University of Würzburg, who, on November 8, 1895, produced and detected electromagnetic radiation in a wavelength range today known as x-rays or Röntgen Rays. Röntgen's discovery of x-ra...
 
    Bell, Inventor of the Telephone - 1876  
Alexander Graham Bell was an eminent Scottish-born scientist, inventor, engineer and innovator who is credited with inventing the first practical telephone. Bell's father, grandfather, and brother had all been associated with work on elo...
 
       
 
         
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