Tests on Maria Branyas Morera, who was world’s oldest person before she died aged 117, gave doctors a trove of discoveries

Tests on Maria Branyas Morera, who was world’s oldest person before she died aged 117, gave doctors a trove of discoveries

Doctors in Spain studied the DNA and biological profile of Maria Branyas Morera, who was the oldest person in the world before her death aged 117 last year.