"A vimana is a mythological flying machine, described in the ancient literature of India. References to these flying machines are commonplace in ancient Indian texts, even describing their use in warfare. As well as being able to fly within Earth's atmosphere, vimanas were also said to be able to travel into space and travel submerged underwater.....
....Many researchers into the UFO enigma tend to overlook a very important fact. While it assumed that most flying saucers are of alien, or perhaps Governmental Military origin, another possible origin of UFOs is ancient India and Atlantis. What we know about ancient Indian flying vehicles comes from ancient Indian sources; written texts that have come down to us through the centuries.
There is no doubt that most of these texts are authentic; many are the well known ancient Indian Epics themselves, and there are literally hundreds of them. Most of them have not even been translated into English yet from the old Sanskrit.
Indian Emperor Ashoka started a "Secret Society of the Nine Unknown Men"-- great Indian scientists who were supposed to catalogue the many sciences. Ashoka kept their work secret because he was afraid that the advanced science catalogued by these men, pulled from ancient Indian sources, would be used for the evil purpose of war, which Ashoka was strongly against, having been converted to Buddhism after defeating a rival army in a bloody battle. The "Nine Unknown Men" wrote a total of nine books, presumably one each. Book number one was "The Secrets of Gravitation!".... "