With a teaching experience of more than 39 years and special interest in Mammalian Ageing, the author superannuated from the University Department of Zoology as the University Professor and relinquished the additional administrative post as the Director of the Institute of Gerontology and Geriatrics, L.N. Mithila University, Darbhanga on Feb 28, 2022. Besides participation in several National and International Conferences in the area of interest, a number of published research papers and books are to his credit.