Health: Chemical Wowie

In print, David Sinclair comes off as a mild-mannered Harvard pathologist given to discussions of "small molecules" and Saccharomyces cerevisiae. On the phone, though, he's a bit more... effusive. "We're making history," he says. "What surprises me--well, a lot of things do--oh, I've gotten carried away. What was my point?" What's got him so excited is none other than a small molecule, and if you happen to want a long and healthy life, it'll have you in a tizzy, too. Sinclair and colleagues...
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