Sinclair is one of the leading scientists in the field of aging and longevity, and he believes that aging isn't a natural part of life—it's a disease that needs a cure.

In his new book, 'Lifespan,' celebrated scientist David Sinclair lays out exactly why we age—and why he thinks we don't have to...

Sinclair is one of the leading scientists in the field of aging and longevity, and he believes that aging isn't a natural part of life—it's a disease that needs a cure.

In his new book, 'Lifespan,' celebrated scientist David Sinclair lays out exactly why we age—and why he thinks we don't have to...