Enquiry into the evolution of aging aims to explain why almost all living things weaken and die with age. There is not yet agreement in the scientific community

Enquiry into the evolution of aging aims to explain why almost all living things weaken and die with age. There is not yet agreement in the scientific community on a single answer. The evolutionary origin of senescence remains a fundamental unsolved problem in biology. http://en.wikipedia.org/wiki/Evolution_of_ageing http://en.wikipedia.org/wiki/Evolution_of_ageing The biological mechanisms which regulate lifespan evolved several hundred million years ago. edit: Regarding dogs: http://www.insidescience.org/content/large-dogs-age-faster-die-younger/953 http://www.insidescience.org/content/large-dogs-age-faster-d...