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Famous Inventions That Changed The World - Full Documentary
Автор: Sterling Documentaries
Загружено: 16 дек. 2016 г.
Просмотров: 85 994 просмотра
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Man's greatest invention may not have been fire or the wheel - but a toothbrush made of twigs.
According to new research by Spanish scientists prehistoric man had discovered that using a mixture of frayed and sharpened sticks to clean his teeth after a meal gave him healthy gnashers long after other animals had lost theirs to decay.
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