The Vimanika Shastra is a text from ancient India that describes a range of flying machines, or “vimanas”, that were supposedly used in ancient times. The text is believed to have been written between the 4th and 7th centuries AD, although the exact origins and authorship of the text are the subject of debate among scholars.

According to the Vimanika Shastra, the vimanas were powered by a variety of energy sources, including electricity, mercury, and solar power. They were also said to be equipped with a range of advanced features, including the ability to travel to other planets, and to be invulnerable to attack.

However, the descriptions of the vimanas in the Vimanika Shastra are highly fantastical and often defy the laws of physics. Many of the features described in the text are highly implausible or impossible, and there is no evidence to suggest that the vimanas ever actually existed.

Despite this, the Vimanika Shastra has been a subject of fascination and study among some researchers and enthusiasts, who have attempted to build replicas of the flying machines described in the text. However, these attempts have generally been unsuccessful, and the vimanas remain a subject of debate and skepticism in the scientific community.