Dinosaurs occupied a variety of trophic levels, and while I have seen evolutionists throw up a lot fantastic ideas and "theories," none of them have provided a mechanism that would explain why dinosaurs are supposedly extinct in light of how diverse they were and how many niches they filled.

The fact is that there are parts of the world where the natives will tell you that some types of dinosaurs are still alive, and there are plenty of artistic depictions of dinosaurs and people struggling with dinosaurs from around the world and through time.

Evolutionists are so eager to bolster their subjectively derived timeframe for "pre-history" that if they find any new discovery they assume it is extinct and place it in their timeline. And often times ambitious people take advantage of their eagerness by selling the bogus specimens or doctored specimens.

You seem to have chosen to accept the brand of evolutionism peddled by the public school system. There are evolutionists who are a bit more analytical and slower to leap to assumptions. Like the guys who wrote the book on the Mokele-mbembe for example. The Mokele-Mbembe is definitely something that deserves study and protection, but if everyone had your mentality no one would even bother to check up on it.