Scientists sequence genome of 194-year-old tortoise Jonathan

Researchers have sequenced the genome of Jonathan, a 194-year-old Aldabra giant tortoise and the oldest known land animal. By comparing Jonathan’s genes with those of younger tortoises, the team found unique genetic variants tied to aging, including those affecting DNA repair and cellular processes. The analysis, published in Science Advances, may offer insight into longevity mechanisms. Obtaining Jonathan’s genetic sample took years of negotiation and coordination.

• Jonathan is a 194-year-old Aldabra giant tortoise
• Genome sequencing revealed unique aging-related gene variants
• Study compared Jonathan to younger tortoises
• Sample collection faced regulatory and practical hurdles
• Results published in the journal Science Advances