I believe in mythologic creatures, scientists and people say
they don't exist, no proof that they did (except myths) but still
no proof that they DON'T exist.
A dragon might have been a strange creature and it was given the
name cause it frightened people by it looks or so.. and so on
rumors about fire breathing dragons grow. A few dinosaur explorers
(dunno the english word) found a few years ago bones from a strange
dinosaur looking like a Dragon. If people from medieval times found
those bones too, they might have though a demonic creature just
died there recently and brought the rumor about new monster
WHO KNOW?