If your philtrum was wet, where on your body would you need to dab a towel in order to dry it off?

On humans, the philtrum is that seemingly perfectly-shaped groove that extends from your upper lip to your nose. Scientists believe that purpose of the philtrum in mammals is to direct odors from the nose to the mouth. For humans and our primate relatives, the philtrum is now just a vestigial feature, with no known function.

Asked by Tom Cohen · Last updated 5 years ago · 12.4K views