The snake's forked tongue helps it smell in stereo.

Why Do Snakes Have Forked Tongues? Deep Look

Premiered May 09, 2023
Why Do Snakes Have Forked Tongues?

To us, a snake's forked tongue evokes danger and deceit. But the tongue's two sensitive tips, called tines, actually help the snake smell in stereo. That's bad news if you're a mouse ...

About the Program

Deep Look

See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small.

Here’s your ticket to stream.

Stream the best of public television on demand with GPB Passport: MASTERPIECE dramas and mysteries, NOVA, Ken Burns documentaries, Finding Your Roots and more. Binge full seasons, get early access to new episodes before they air on television and catch up on programs you missed with this powerful donor benefit from GPB!