知识世界

History:Johannes Gutenberg and the Printing Press

In 1450 an invention changed the world. In the German city of Mainz， Johannes Gutenberg invented the technique of printing with movable type. This made it possible to duplicate books in large numbers and at relatively low cost. The technological foundation was laid for the intellectual， political and religious changes of the succeeding centuries.

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  History： Secrets of the Anasazi

  
• 02

  History： Alfred Nobel and Dynamite

  
• 03

  History： What The Ancients Did for Us — The Greeks

  
• 04

  History： Mysterious Places — Chartres France

  
• 05

  History： Seven Wonders of Ancient Rome

  
• 06

  History： The Egyptians

  
• 07

  History： Planck and Quantum Physics

  
• 08

  History： Mysterious Places — Pompeii Italy

  
• 09

  History： Transportation Achievements

  
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  History： Poisoned