Vimanas-the “UFOS” of ancient India. Recorded in the Vimanika Shastra which is undoubtedly a modern version based on earlier texts, these craft along with missiles (brahmastras) and nuclear warfare makes the pages of the most ancient scriptures of India including the Ramayana and Mahabharata which are thousands of years old.

more info on vimanas:http://www.hinduwisdom.info/Vimanas5.htm