Dr. B. N. Narahari Achar, is Professor Emeritus at the University of Memphis in the Physics Department. He earned his B,. Sc (Hons) degree from Mysore University and M. S. and Ph. D. degrees from the Pennsylvania State University. He taught at the Pennsylvania State University and Bucknell University before joining the University of Memphis. His primary research area is in the theory of Solids and recently in the application of Fractional Calculus to Physics. His other interest is in the ancient astronomy of India and applications of Planetarium software in its study. He has contributed to the determination of the Date of the Mahabharata war. He is currently working on tracing the history from Rigveda to Nandas through Mahabharata, Parikshit and Janamejaya. He has developed a new model for the structure of RigVeda.