Answer:
Because dragons are present in many documents from many different cultures, and because science cannot always explain everything, it is possible that dragons existed at some point.
Step-by-step explanation:
This is an example of how this passage could be summarized in one sentence. In this passage, the author tells us that she became interested in finding out whether dragons were real or not. She also tells us that she had reason to believe that dragons could be real, particularly because they are mentioned in a variety of documents from many different cultures.