Diane Sawyer, of ABC news, reports on the science of aging. How do telomeres affect the aging process? Can the aging process be changed? Slowed down? or reversed? These are the questions that scientists are working on. This video brings up some interesting points. The story discusses a blood test to measure your telomeres and are claimed to predict your lifespan or how long you will likely live. Would you want to know how long you will live? Can you make changes that will effect your life expectancy? They suggest the usual suspects as threats to your longevity, smoking, stress, drinking. They suggest that rest, exercise and meditation can lengthen your life expectancy.