In the Vedic literature of India, there are many descriptions of flying machines that are generally called vimanas. These fall into two cate- gories: (l) manmade craft that resemble airplanes and fly with the aid of birdlike wings, and (2) unstreamlined structures that fly in a mysterious manner and are generally not made by human beings. The machines in category (l) are described mainly in medieval, secular Sanskrit works dealing with architecture, automata, military siege engines, and other mechanical contrivances. Those in category (2) are described in ancient works such as the Rg Veda, the Maha-bha-rata, the Rama-yana, and the Pura-nas, and they have many features reminis- cent of UFOs.
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