Supercentenarian gives scientists insight on secrets of healthy old age

Tests on Maria Branyas Morera, who was world’s oldest person before she died last year aged 117, gave doctors a trove of discoveries
The nonagenarian actor Dame Joan Collins may have been on to something when she declared “age is just a number”.
The deepest dive yet into the biology of a supercentenarian has revealed that even extreme old age can be reached without the brain necessarily faltering or the usual illnesses mounting up.