The Evolution of Teeth

Teeth are a marvel of nature. They are engineered to crush what we eat without breaking, and to last a lifetime (as long as we keep them fairly clean). Each species of mammal with teeth has developed teeth shapes to deal with the kind of food they eat. This TED-Ed video takes us through the structure, function, and evolution of teeth. We should appreciate them before something goes wrong with them -take it from me, I just spent a year (and tons of  money) on dental reconstruction. (via Digg)