Peoples of ancient times claimed that they were taught civilization from sky people who were very tall, blue-eyed, blond, good-looking Nordic types. In large national libraries in Asia there are also many ancient histories over 4,000 years old, which explain in great detail Venusian spacecraft, their pilots, their missions on Earth, intervention in Earth affairs, and involvement in ancient interplanetary wars fought on Earth.
Some of these writings explain the method of propulsion of these alien craft in great technological detail, which sounded like legend until recent scientific discoveries proved this science was accurate. Among these ancient writings are the Book of Dzyan, Vaimanika Shastra, Maosola Purva, etc. Belief in Venusians was common and normal in ancient times before government and religious censorship!