It is estimated that approximately 50 million pounds of toothbrushes end up in US landfills every year. The bristles wear out, but it's the plastic handles that make up the majority of this waste. The ...

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Modern nylon bristle toothbrushes were first developed in 1938. However, early civilizations used slender twigs with tattered ends to brush teeth. The use of these "chew stick” started during 3000 B.C ...