I clicked through to your first link, on dragons fiction or fact. Checking all your claims would take time; however, I will make three observations.
First, the photos shown are thoroughly ambiguous about what they actually depict. You give no background information on any of them, so it is not possible to determine whether they are ancient or modern. The only one that convincingly represents a dinosaur – the Acambaro figure – is of unknown provenance. Apologies for quoting Wikipedia again, but if you want to refute it, please provide us with a reliable source that contradicts it, rather than just dismissing it as “meh, Wikipedia.”
Second, I did a Google search for your claim about the Roman army putting a dragon hide on display in Rome. The only citations I could find in support of this one were fringe, two-guys-in-a-garage websites. I did find this question on Quora which addressed it however. It cites three websites, two of them belonging to major universities and a third by a professional historian. Again, if you wish to refute the Quora response, please provide us with a reliable source that contradicts it, rather than just dismissing it as “meh, Quora.”
Third, you haven’t adequately cited your sources on your article. You’ve listed three books at the bottom as references, but you haven’t indicated which one is the source for which claim, nor have you cited any page or chapter numbers, nor have you given any clickable links.
Jonathan, @gbrooks9’s statement here was simply a statement of fact, not circular reasoning. The way to refute a statement of fact is to provide a counterexample, not brush it off as “circular reasoning” that “agrees with your worldview.” That kind of response is merely an indication that you haven’t a clue what you’re talking about.
Accordingly, can you show us either (a) a dinosaur fossil above the K-T boundary, or (b) a remnant of the Quatenary glaciation below it?