See, this is news to me because I always thought that tyrannosaurs had lips, simply to keep their food in their mouths. I swear I read about it in an article I saw when I was a kid, but now people are talking about it like it's some new revelation. What's the deal?Personally I think the revelation T-Rex had "lips" was way more jarring. I'm so used to dramatic portrayals in movies where the Rex's teeth stick out across its lower jaw like a crocodile's. The new look is a lot more avian.