Man’s greatest invention may not have been the wheel or taming fire¿ but the twig toothbrush, because it gave us longer lives to invent and evolve

Scientists in Spain say prehistoric man worked out 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.

Posted: 2013-10-18 17:04:00

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