Tolerance.ca
Looking inside ourselves and out at the world
Independent and neutral with regard to all political and religious orientations, Tolerance.ca® aims to promote awareness of the major democratic principles on which tolerance is based.

Ancient Tooth Plaque Reveals Diet

Long before the development of agriculture, our prehistoric ancestors had a good knowledge of plants – not just for food, but for medicine. Researchers found evidence of this by studying some ancient teeth found in Central Sudan. Dental hygiene has become an important part of modern-day health care. And many millions of dollars are spent every year to get or keep teeth and gums healthy. One of the things dentists warn their patients about is dental calculus or tarter – a very hard...

Read complete article
© Voice of America -


Follow us on ...
Facebook Twitter