I believe the ancient astronauts were actually angels from another dispensation, who came to this continuum to bring man up in the earth. They made this planet suitable for life when they commandeered a planetoid, crashed it into the earth which established the moon, along with other specific requirements. They engineered life from their camp in South American and man was brought up in the earth. Can you imagine what those migratory humans thought when they first walked up on this heavenly campsite.
It was from that campsite by which they managed the virgin birth of Jesus Christ. What do you think?
Ken