Prithivi Ra Brahmand

About five million years ago, man might have stood on a mountaintop and looked up at the sky. People may be afraid of sunlight and its light. At night, he must have seen the rays of the moon and the sun playing hide and seek with the falling waterfall. He must have seen a star shining in the sky. At that time, a piece of cloud may have come from somewhere and covered the moon and stars. He must have been shocked to see such incidents on a daily basis. He was definitely curious, what is all this? And he desired to know the secrets of the earth and the sky.