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.
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Image result for what was de Pineda looking for on his trip
The stated purpose of Álvarez de Pineda's voyage was to explore the coast between the discoveries of De León on the Florida peninsula and those made on behalf of Velázquez along the southern Gulf, in hope of finding a strait to the Pacific Ocean
To establish fair access to employment opportunities to create a workforce that is an accurate reflection of the demographics of the qualified available workforce in the relevant job market
Precision controls I think