T-Rex: T-Rexes live to about 30 years. I'm 15.
T-Rex: MID-LIFE CRISIS!
T-Rex; But I'm also a teenager! I want to buy a sports car but I don't make enough on my paper route!
Utahraptor: That that's tough? I live to 12!
Utahraptor: I'm having my mid-life crisis and don't even have my grown-up teeth yet.
T-Rex: Wait. Why do we have milk teeth?
T-Rex: That makes zero sense!
The author writes:
 Erickson, Gregory M.; Makovicky, Peter J.; Currie, Philip J.; Norell, Mark A.; Yerby, Scott A.; Brochu, Christopher A. (2004). "Gigantism and comparative life-history parameters of tyrannosaurid dinosaurs". Nature 430 (7001): 772–775. doi:10.1038/nature02699.
 Unlike the rest of this comic...