Scientists have made important gains in recent years in understanding the aging process. One important key appears to be telomeres, or more specifically, telomere length. These are stretches of DNA that sit at the end of chromosomes and protect genetic data, making it possible for cells to divide. They are like the plastic tips on the ends of shoelaces. Just like those tips prevent shoelaces from fraying, telomeres do the same for chromosomes, preventing damage that would scramble genetic information in ways that may raise risk for chronic disease….