The answers are not easy
§We all know what aging is, a process through we progressively become more vulnerable to diseases and disabilities and eventually die.  Aging is growing older.
§ But scientists disagree not only about what causes aging but what about it actually is.
C:\Documents and Settings\Vincent Giuliano\My Documents\My Pictures\Proteins\baby.jpg C:\Documents and Settings\Vincent Giuliano\My Documents\My Pictures\Proteins\old%20person%20in%20bus.jpg