its silly to seperate biology and physics, seems to me that biological systems are also physical systems. other then that, stress causes aging. people who redu

its silly to seperate biology and physics, seems to me that biological systems are also physical systems. other then that, stress causes aging. people who reduce stress keep their mind younger and often live longer and are less effected by diseases common among aging biological systems. ofcourse, stress then isn't the root cause of aging... as stress takes many forms, what causes stress is. so the answer to what causes aging is probarbly not a single point or item, but a combination of factors which all cause some form of stress on the system.