According to Jon Mitchell from the University of Chicago, "A SET of 200-million-year-old teeth from a beast related to dinosaurs and crocodiles has shed light on how snake fangs evolved. They support the idea that venom canals inside fangs evolved from grooves on the tooth surface." Jon and his colleagues discovered 26 Uatchitodon teeth that shows how grooves initially formed at the surface and gradually lengthened and deepened until they became enclosed canals. Bryan Grieg Fry from the University of Melbourne, Australia, is convinced this is the case, and says the fossil series is "fantastic".
Storyteller: Jon Mitchell, University of Chicago and Bryan Grieg Fry, University of Melbourne
Also see: How SNAKE got his fangs