> Leading demographers claim that human lifespan is fixed at a natural limit around 122 years. According to 2019 book "Lifespan: Why We Age And Why We Don't Ha

> Leading demographers claim that human lifespan is fixed at a natural limit around 122 years. According to 2019 book "Lifespan: Why We Age And Why We Don't Have To"[1][2] by David A. Sinclair, the science does not know anyone who lived until 120. Scientists studied centenarians (people who lived to be 100 years old) and supercentenarians (110) from around the world to see what made them tick longer. To my knowledge, there is no *centenarian word for 120 years old person yet. [1] https://en.wikipedia.org/wiki/Lifespan:_Why_We_Age_%E2%80%93_and_Why_We_Don%27t_Have_To https://en.wikipedia.org/wiki/Lifespan:_Why_We_Age_%E2%80%93... [2] https://www.goodreads.com/book/show/43723901-lifespan https://www.goodreads.com/book/show/43723901-lifespan