Our ancestors lived in the times when resources were in plenty and there was zero pollution. They had attained mastery in all fields of science and technology and had a profound understanding of the creation and the laws that govern it. They had unravelled the mysteries of human body and environment from core to periphery. The modern scientists are still trying to decode the sciences of creation, only to rediscover what the rishis had told us eons ago. Till now they have only touched the periphery. This one gets to the core !!!