Dragons and Dinosaurs
There are two views about dragons. One idea about dragon stories around the world is that primitive people commonly make up stories about monsters. I guess that's possible, but there are also reasons not to believe that. After all, primitive people lived in proximity to so many real dangers, it hardly seems they would resort to made-up monsters to frighten themselves. There is also the question of why they would pick giant reptiles as their monster of choice unless they were inspired by real creatures. Modern reptiles just aren't big enough to inspire giant reptile legends. Finally, there is the question of why these dragon stories are so pervasive, appearing in many cultures around the world. The most credible explanation is that dragons are based on real experience.