I would dearly LOVE dragons to exist and I wouldn’t mind the odd elf or unicorn either. However, most mythical creatures find their roots in other real animals and usually reflect an aspect of a culture or represent something specific in a story. They’re very much human constructs. However- there was once a time when people thought dragons were real. There is a lot of dragon mythology in China and Europe. I wonder whether very early dinosaur bone discoveries were mistaken for dragons? Dinosaur bones were being found for thousands of years but the first ‘dinosaur’ wasn’t described in a Journal until the early 1800’s by William Buckland. Before then people didn’t really know what these gigantic bones were. China is FULL of dinosaur bones and a lot of our dragon culture has been borrowed from there. So people at least thought they were real.