An extremely old giant tortoise named Jonathan may hold the secret to a long, healthy life
An international collaboration led by a neurologist and experts in advanced genomics at Vanderbilt Health has coaxed one of the secrets of extreme longevity from a 194-year-old giant tortoise named Jonathan.

<p>An international collaboration led by a neurologist and experts in advanced genomics at Vanderbilt Health has coaxed one of the secrets of extreme longevity from a 194-year-old giant tortoise named Jonathan.</p>