According to researchers, the trick to longevity may simply be a matter of increasing the human "health span," which normally drastically starts to deteriorate at age 60. Already a few methods are being tested to help the body kill old cells but the researchers note that many human organs are not designed for long term use.
Humans aren’t built to last forever. The oldest person on record was Jeanne Calment, a Frenchwoman, who died in 1997 at the age of 122. In 2040, the average life span for people in Spain, projected to pass Japan as the country with the longest-lived citizens, will reach about 86 years.
There is considerable dispute, however, over how long humans might live under optimal circumstances. In 2016, a team of scientists declared the upper limit to be 115 years. But in June, researchers reviewing death rates among elderly Italians suggested that there may be no limit at all.
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