Board Thread:General Discussion/@comment-26200221-20151211162449/@comment-34326521-20160221125929

Yes, they're very different from Ultimate Humungousaur's projectiles. That's where evolution comes into play.

Not retractable jaws; detachable jaws. As in, their jaws can pop out of their mouths. I've seen a shark practically throwing its jaws at something (I think it was a device to measure its jaw strength) to bite it. I can't see why they'd have this ability, as they're already fast and strong - they're at the top of the food chain, after all. Just because it's common doesn't mean it's not strange.

How do you know there's little that can kill them? How do you know rocket launchers weren't needed? We don't know what Terradino is like. We don't know what it could be like, in a "worst case-scenario". You don't think a Tyrannopede is a good justification for rocket launchers? If I saw that thing coming at me, even if I was a 60-foot dinosaur, I'd sure like a rocket launcher to defend myself with.

You seem to be conflating Lamarckian evolution with the current theory. The reason something becomes vestigial is not because the species actively tries to get rid of it, or because it's "not needed" (for survival, presumably). It's because it's not a factor in reproduction. Our nails, for instance, are irrelevant for survival. However, because most of us like to have fingernails, and find the lack thereof strange or even repulsive, a person without even a single fingernail is unlikely to pass on their genes. However, if something is not detrimental to survival (like the lack of an appendix), and the individuals of that species don't actively try to reproduce with other individuals that possess that characteristic (like ours; we can't even tell if someone has an appendix), then it will become vestigial because there's no selection for it. It's basically the biological equivalent of "nobody cares, so nobody notices and it's forgotten".