There isn't any proof, that dragons made real was just some lame special on discovery a few years back. Also the dragon in the glass jar thing they have at the end has been proven to be a hoax. In any case it's interesting that each culture has a mention of dragons in some way, then again almost all of them also mention aliens. :/ Point being if there was anything close to a dragon, I doubt it would breath fire and be anything like the stereotypical hype. Also I don't really think the bible is proof of dragons, at least not real ones.