Have you ever wondered if slugs can smile — or if they even have teeth? How a slug eats is surprisingly complex!

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. In prehistoric communities across what is now northeastern Europe ...

Teeth first evolved as sensory organs, not for chewing, according to a new analysis of animal fossils. The first tooth-like structures seem to have been sensitive nodules on the skin of early fish ...