Satya , Treta , Dwapara and Kali are four yugas in Vedic Astronomy by which time is measured . Each yuga has its characteristic by which it influences life on earth . Climate of the earth , continents , mountain & seas , plant & animal life , every thing changes as per the yuga . DNA of human of every yuga has its unique features . These features affect strength of the body , mind & prana . Bodies in earlier yugas could manifest more powers of the mind than in current Kaliyuga , dark age . Out of these four , Tretayuga is time where humanity was at its peak in knowledge , technology & body-mind powers . Satyayuga is more like ideal state of equipoise , from which first great time period starts . Tretayuga was age of great Kings like Rama , Ravana , Parashurama , Sahasrarjuna , great sages like Vasistha , Vishvamitra , Parashuram who invented higher & higher knowledge from Vedas . They developed all technology by constant efforts which is called Yagya . And thus they say Yagyas were at peak in Tretayuga . This was the time where great and tall stone structures were built across the earth which still stands of changing time . This book is effort to connect the dots . Understand what was the earth in Tretayuga . How strong body-mind of human was at that time & how he used to build great technologies . From Anti Gravity Vimanas to use etheric force to move mountains , this book takes overview of all these factors and take you to ancient past a