Indian concept of the creation of the universe is well presented in the Vedas - especially in the Rgveda. The present book is a unique work in which the author tries to dig out this knowledge about Mystery of the origin of the universe from the hymns of the Rgveda. In this book, the author re-reads some of the hymns like Purusa SUktam and Nasadiya SUktam of the Rgveda to mine out valuable knowledge related to the Cosmology. He also seeks the help of Gayatri mantras and some other hymns of the Rgveda to investigate the underlying patterns of a theory of the creation of universe. In fact, he brings out the theory of the creation of the universe that occurred as a result of yazna. This book is also valuable to the Soma yajlia and the Atiratra, which are still prevalent in Kerala. He also finds close relationships between the Sulba sutra and the yajiza rituals which leads him to the underlying connection between mathematics and Rgveda.