Also these 100+ year old people hit multiple genetic jackpots, avoiding diseases of suboptimal metabolism and cellular senescence as well. There are many other populations that could be analyzed: the 70+ year old relentless sunbathers with leathery skin but no skin cancers, the 90 year olds smoking 2 packs a day for 60 years with pristine lungs. Because these people don’t end up in clinics there is not necessarily as much known about their innate resilience to carcinogens or other malign influences.