In his book, “Lifespan,” celebrated scientist David Sinclair lays out exactly why we age—and why he thinks we don’t have to.
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- Graham Averill

If scientist David Sinclair is correct about aging, we might not have to age as quickly as we do. Photo by tomazl / iStock.
The oldest-known living person is Kane Tanaka, a Japanese woman who is a mind-boggling 116 years old. But if you ask David Sinclair, he’d argue that 116 is just middle age. At least, he thinks it should be. Sinclair is one of the leading scientists in the field of aging, and he believes that growing old isn’t a natural part of life—it’s a disease that needs a cure.