Researchers Find Stable Gene Switches And DNA Resilience In 194-Year-Old Giant Tortoise Jonathan

Phys.org Science•Published: Oct 7, 2026 11:30 PM IST

Scientists studying Jonathan, a 194-year-old Aldabra giant tortoise and the world's oldest land animal, have discovered that his remarkable longevity stems from stable gene regulators and minimized genetic wear and tear. Published in Science Advances, the study identified 287 unique gene variants and exceptionally preserved epigenetic switches controlling DNA repair and metabolism.

Unique Gene Variants: Researchers pinpointed 287 specific genetic variants that actively reduce typical aging effects by repairing DNA damage, suppressing cancer, and regulating insulin.
Stable Epigenome: Comparing Jonathan's gene 'on/off' switches to younger tortoises revealed his DNA repair and metabolism regulators remained remarkably unchanged over nearly two centuries.
Cellular Resilience: The longevity research nonprofit Kallel led the investigation, highlighting how nature has engineered biological blueprints for extreme cellular resilience and anti-aging.

The Context & Background

Jonathan hatched around 1832 and has lived most of his life on the island of St. Helena after arriving as a gift 144 years ago. The research team hopes that cracking the genetic code of such multicentury life forms will inspire new, practical treatments for chronic human diseases related to aging.

Why it matters:Understanding how creatures like Jonathan maintain stable gene regulation over centuries offers invaluable blueprints for human longevity science. Because aging remains the primary risk factor for most chronic diseases, these evolutionary insights could pave the way for breakthrough therapies that democratize access to anti-aging medicine.

Enjoyed this 2-minute breakdown?

Share it with your colleagues and friends!