It varies. There has been some fascinating research on how the ancient Greeks viewed dinosaur bones, though. They use to rearrange them into humanoid forms, believing them to be from a mythic age when people were giants. Myths of the gryphon also almost certainly come from protoceratops fossils.
Thank you for answering. I may do some reading on the subject. Very interesting.
Also, considering that they are based upon those myths, I was already thinking of dragons as dinosaurs in Skyrim before you guys told me this, because to me that notion makes them infinitely cooler. We've got mammoths, sabertooth tigers and other animals from the ice age. So I thought it cool to think of dragons as dinosaurs even though technically they're quite a bit further into the past. I mean, who doesn't like dinosaurs, right? Good to know that it's not out of the realm of plausibility to think of them that way though.