Dr. William Hylander, Duke University Professor of Anthropology Emeritus, dropped by the Grayson County Library on Friday July 8th to share his 'How Mammals Make a Living' program. With a stunning array of skulls complete with jaw bones, Bill showed how teeth define what an animal eats, how it lives and defends itself.

Canines are the 'fangs' or ripping tools, incisors are the biting tools, and molars allow chewing. Depending on whether a mammal is carnivorous, omnivorous or herbivorous, tooth and jaw details and arrangements give clues to that animal's life history.