A 194-year-old tortoise, world's oldest land animal, may hold clues to longer life

Jonathan, a 194-year-old tortoise, is currently recognized as the world's oldest land animal. While Aldabra giant tortoises are typically known to live for more than 100 years, Jonathan has far exceeded this standard lifespan. Because of his extraordinary age, researchers believe this specific individual may hold critical clues to understanding longer life. His survival provides a unique opportunity for scientists to study the biological factors that contribute to such extreme longevity in land animals.