Study of Jonathan the Tortoise Reveals Genetic Clues to Longevity
Jonathan, a Seychelles giant tortoise living on Saint Helena, is the oldest known land animal at 192. A genomic study found he carries many variants tied to reduced inflammation, insulin control, cancer defense, and better cellular repair. The research also fits with growing evidence that elderly animals can play important roles in helping their species persist.
Jonathan, a Seychelles giant tortoise, has lived on Saint Helena since 1882 at the governor’s residence. At 192, he is roughly a century older than most others of his kind. Researchers studied cheek scrapings and reported in Science Advances that his DNA carries many variants tied to lower inflammation, insulin regulation, cancer resistance, and self-repair. Lead author Stephen Clark, of the nonprofit Kallel, said the findings may help explain how cells endure.
Scientists are increasingly recognizing that elderly animals can help species persist. They may pass on survival knowledge, contribute heavily to reproduction, and fight disease better. Ecologist Keller Kopf notes such roles can be missed when only population numbers are counted, while conservation has often favored younger animals.
This story may draw attention from longevity researchers, conservationists, and general readers interested in aging. Genetic findings in a tortoise could inspire further comparative studies, though direct human applications remain uncertain. Recognizing elderly animals’ ecological roles may affect how some conservation programs assess populations and prioritize individuals. It could also shift public perceptions of older organisms, framing them as carriers of resilience and knowledge rather than merely survivors.