David Sinclair’s Book Review and Summary Little by little, millenia by millenia, we’ve been adding years to the average human life through access to stable food sources and clean water. But although the average moved up, the limit did not. As long as we’ve been recording history, we have known people, who have reached their 100th year and who might have lived beyond that mark. But we rarely reach 110. Almost no one reaches 115. Measuring Biological Age To put yourself into an aged mind-set, try this little experiment. Using your nondominant hand, write your name, address, and phone number while circling your opposite foot counterclockwise. Different functions peak at…