Developing the mysterious condition in people who do not have it may help to improve learning skills, aid recovery from brain injury and guard against mental decline in old age, writes Helen Massy-Beresford
James Kingsland: Apparently healthy older men who have poor social support networks and abnormal physiological responses to stress show signs of accelerated cell ageing
Rosemary's stay in hospital was too perfect – she begged to be left alone by nurses who bugged her every half hour with checks and questions that they must carry out to the letter, writes Michele Hanson
Today the rich, multi-faceted experience of getting older has been pathologised and reduced to shame about looking old. But it doesn't have to be this way, says Anne Karpf