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The toothbrush evolved over time and mainly out of necessity. Traces of the first toothbrush can be dated back as early as 3500 B.C.E. These bamboo sticks were then used just like a modern manual toothbrush to clean the teeth. Eventually, the Chinese version of the toothbrush made its way to Europe.
Timbuktu was a place where ideas were shared and quickly became a center for learning.
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An economic slump due to the government over spendings in Vietnam
