Non-Cardiac Ultrasound Primarily Used By Radiologists, Thomas Jefferson University Study  
11/3/2011 7:49:50 AM

One of the few reliable ways to extend an organism's lifespan, be it a fruit fly or a mouse, is to restrict calorie intake. Now, a new study in fruit flies is helping to explain why such minimal diets are linked to longevity and offering clues to the effects of aging on stem cell behavior.