You may take them for granted, but your teeth are a marvel. They break up all your food over the course of your life, while being strong enough to withstand breakage themselves. How do they do it? Peter S. Ungar traces the evolution of mammalian molars from primitive cone-like structures to the myriad forms of today’s species, from lions to cows to people.

QUESTIONS: 

1. What images spring to mind when you hear the word "teeth?" 

2. Are your teeth in good condition?

3. What do you do to look after your teeth?