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    Christian Doppler, Physicist  
Christian Andreas Doppler was an Austrian mathematician and physicist. He is celebrated for his principle known as the Doppler effect that the observed frequency of a wave depends on the relative speed of the source and the observer. He...
 
    Dowager Cixi, Empress of China  
The Dowager Empress Cixi popularly known in China as the Western Empress Dowager, and officially known posthumously as Empress Xiaoqin Xian, was a powerful and charismatic figure who was the de facto ruler of the Manchu Qing Dynasty, rulin...
 
    C. S. Lewis, Writer  
Clive Staples "Jack" Lewis, commonly referred to as C. S. Lewis, was a British writer and scholar. Lewis's works are diverse and include medieval literature, Christian apologetics, literary criticism, radio broadcasts, essays on Christianit...
 
       
 
         
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