Thank you for that. I see the French woman Jeanne Louise Calment (21 February 1875 – 4 August 1997) who long held the title of world's oldest person is an impre

Thank you for that. I see the French woman Jeanne Louise Calment (21 February 1875 – 4 August 1997) who long held the title of world's oldest person is an impressive outlier. I heard a description of the life of Calment by a local researcher who participates in longitudinal studies of extreme old age. She outlived her husband, and all her (few) descendants. She only gave up smoking when she became so blind that she could no longer see the end of a cigarette to light it. The researcher told me this story (taken here from Wikipedia) about how she kept living in her house after she became aged and widowed: "In 1965, aged 90 years and with no heirs, Calment signed a deal to sell her former apartment to lawyer André-François Raffray, on a contingency contract. Raffray, then aged 47 years, agreed to pay her a monthly sum of 2,500 francs until she died. Raffray ended up paying Calment the equivalent of more than $180,000, which was more than double the apartment's value. After Raffray's death from cancer at the age of 77, in 1995, his widow continued the payments until Calment's death."