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 ...

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 ...

To keep your dog's mouth clean, you should brush their teeth once ... Both human and dog mouths contain hundreds of microorganisms and bacteria. Some of these microbes overlap between the two ...