Aging process is a multi-factorial phenomenon. Aging is in fact a series of parallel processes directly or indirectly related to one another. The editors and co-editor N. Wolanski and A. Siniarska have a specific vision of this phenomena based on over 40 years panoramic research experience in Poland, USA, Yugoslavia and Mexico. J.F. Schroots from The Netherlands presents age changes in an individual organisms as a system within the more general system of nature. ...