It is a natural condition of man (or woman) to wonder about such questions. Did ancient man wonder and try to understand his own ancient past and beginnings? I believe that he did. He looked up into the skies and deeply into the forests for clues and lessons. He also passed down an ever changing ever growing body of knowledge on to each succeeding generation. We can never know how many myths, legends and stories have completely died; lost forever among the memories of the dead. Fortunately there are a great many documents, works of art, structures, etc. left and almost certainly many more yet to be discovered that will give us glimpses into the human of the ancient past.
Take a look at this picture.
Photo from Could Dragons Have Been Dinosaurs?
A dinosaur in a cave drawing? Wow! There has been a debate for a long time now with many holding the view that humans and dinosaurs actually co-existed for a period of time. While I have heard of the notion, even years ago, I have never really studied the theory. But just a quick glance over the Could Dragons Have Been Dinosaurs? article it really makes one wonder and definitely merits a further investigation. It could very well be that myths and legends of dragons were spawned from memories of the last big dinosaurs. And perhaps it was man who hunted them down and destroyed the last few survivors - as is often told in the dragon slaying tales... Think... think... think...