Are there alien messages embedded in ancient monuments, carvings and texts? Could there be an extraterrestrial connection to mysterious geoglyphs like the Nazca Lines of Peru? Why are the Hindu symbols of the mandala and the swastika found in separate cultures all over the world? Could ETs be continuing to attempt communication with us through the over 10,000 crop circles that have been reported worldwide? And if so, just what are they trying to communicate? Perhaps the answers can be found by examining ancient religions and mythologies, where we find stories of beings coming down from the sky – sometimes in flying crafts – to impart knowledge to our ancestors.