Narrator: Lions have them, hippos have them, and even you and I have them: canines, those long, pointy front teeth. They're actually the longest teeth in the human ... use canine size and shape ...

Why do humans have canine teeth? Patrick McGannon ... says Richard Potts, director of the Human Origins Program at the Museum of Natural History. Neanderthal DNA makes up a small percentage ...

The biggest difference in cleanliness between dog and human mouths is that humans practice regular oral hygiene with daily teeth brushing and flossing, says Dr. Celia Friedman Cowan, Director of ...