Science

Jonathan the giant tortoise, 194, offers up insight into secrets of longevity

The Guardian Science · 7 October 2026 at 19:00

Jonathan the giant tortoise, 194, offers up insight into secrets of longevity

DNA analysis of oldest living land animal reveal patterns on genes that appear to protect functioning of mitochondria The ancient quest to extend human lifespan has received a boost after scientists analysed the genetic code of the world’s oldest living land animal, a giant tortoise called Jonathan.

The tortoise, which lives in the grounds of Plantation House, the official residence of the governor of Saint Helena in the South Atlantic, is believed to be 194 years old, making him a contemporary of Queen Victoria and Charles Darwin.

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Jonathan the giant tortoise, 194, offers up insight into secrets of longevity

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