About Meat Curtain Hypothesis
UPDATE/EDIT 03/2017: Research on new tyrannosaurid skull shows no evidence of lips, instead scales that would leave no room for them. Bit lenghty read but worth it! So much for lips on dinosaurs
EDIT 02/2017: Also, this comment by LeonelSaberTooth. Seems that vets don't confirm that cat teeth crack without saliva. http://comments.deviantart.com/1/661708892/4323076086
Lately, it seems impossible to post an innocent sabertooth image to dA without repeated comments demanding you add bulldog lips. Browsing my watches and groups, I've seen that idea gone wild, and people being unaware where it even came from, accepting it as gospel.
It's based on a singular post in a mostly angry blog (seriously, go to the newest entry and take a look at the tone). There's no scientific publication about it, nor have I seen any critical review or reaction by a paleontologist. It seems to lead a strange life of its own here on deviantART where most of the time,