Sinornithosaurus had grooved teeth, room for poison gland
(Newser) -
As if three-inch teeth don't sound deadly enough, at least one dinosaur may have delivered poison through those chompers. Two paleontologists examining the fossil remains of the Sinornithosaurus, a turkey-size cousin of the velociraptor, noticed it had grooved teeth, much like those on venomous lizards or snakes. Upon closer inspection,...