TY - CHAP A1 - Orzack, S. T1 - How and why do aging and life span evolve? Y1 - 2003 A3 - Carey, J.R. A3 - Tuljapurkar, S. T2 - Life Span: Evolutionary, Ecological, and Demographic Perspectives CY - New York PB - Population Council: Supplement to Population and Development Review ER -