The body of research on the process of human aging has grown considerably in recent years, and the reports presented here explore a full range of approaches to this research, from the molecular and genetic to the cellular and organismic levels. The contributing scientists identify the processes of aging and find functional and mechanistic approaches that may delay, prevent, or arrest the progress of aging and those ailments generally linked to senescence, such as metabolic, cardiovascular, and autoimmune diseases. The investigation of various approaches to the prevention of aging will include efforts to mitigate the deleterious consequences of chemical pollution. NOTE: Annals volumes are available for sale as individual books or as a journal. For information on institutional journal subscriptions, please visit www.blackwellpublishing.com/nyas. ACADEMY MEMBERS: Please contact the New York Academy of Sciences directly to place your order (www.nyas.org). Members of the New York Academy of Science receive full-text access to the Annals online and discounts on print volumes. Please visit http://www.nyas.org/MemberCenter/Join.aspx for more information about becoming a member.