DNA sequencing of 194-year-old giant tortoise Jonathan reveals 287 unique gene variants and stable mitochondrial epigenetics that offer clues to extreme longevity.

Ethel Caterham holds the title of the world's oldest living person following a lifetime spanning major historical eras and global changes.

Anti-aging advocate Bryan Johnson has revealed a diagnosis of autoimmune gastritis, marking a new challenge for his data-driven health project, Blueprint.