It likely all started when the back of the mouth left the front.
“How’d you get those newfangled teeth?” hissed the petite garter snake to the venomous cobra. “Same way that you got yours,” cobra replied. All fangs — no matter their size, shape or position — descend from a single evolutionary event, new evidence from snake embryos suggests.
“I’m sky high on this piece of work,” comments Ken Kardong, a biologist at WashingtonStateUniversity in