Researchers are studying the genome of the world's oldest land animal — a 194-year-old tortoise named Jonathan — to uncover secrets about his longevity.
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Kathryn Fink
Kathryn Fink is a producer with NPR's All Things Considered.
Mary Louise Kelly is a host of All Things Considered, NPR's flagship afternoon newsmagazine. She is also the host of NPR's national security podcast, Sources & Methods.
