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US scientists believe that 125 is the maximum age for humans, due to the 'Hayflick limit,' which means that a certain amount of the body's cells will stop multiplying. Dan Damon spoke to Dr Claire Steves, a gerontologist at Kings College London (who was not involved in the research). (Photo: Jeanne Calment, who was the world's oldest person died aged 122. Credit: ERIC CABANIS/AFP/Getty Images)
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