Here is a question for all of you out there. Genesis 6:4 says, "The Nephalim were on the earth in those days--and also afterward--when the sons of God went to the daughters of the human beings and had children by them. They were the heroes of old, men of reknown." What does this mean? Who were the sons of God? Where did they go? Are they still among us and still having children with the daughters of human beings? Could this truth have contributed to the mythology of Greece and Rome? Could it have inspired the Percy Jackson series by Rick Riordan?
For some possible answers/discussion see Answers in Genesis.