Can a Blood Test Determine How Long People Will Live?

A new blood test could potentially offer some proof that many people really are older than they look. The test, set to go on sale to the British public later this year, measures the length of a person's telomeres, which are the pieces of DNA at the ends of chromosomes. As cells keep dividing with age, the telomeres get shorter and shorter. By measuring telomeres, some scientists believe they can determine biological age, which doesn't always equal chronological age. "That means some...Full Story
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