Lifespan: Why We Age—and Why We Don’t Have Toby David A. Sinclair I’ve come to appreciate the format of popular science books the more I read them. The good ones are written by pros in the field, who actually have a science degree and do research in an established institution, so you know, their reputation in academia is at stake. David Sinclair’s book Lifespan: Why we Age and Why We Don’t Have To, unfortunately, looks suspiciously like a scam book....