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No detectable limit to how long people can live

New study finds no evidence that maximum lifespan has stopped increasing

Date:
June 28, 2017
Source:
McGill University
Summary:
By analyzing the lifespan of the longest-living individuals from the USA, the UK, France and Japan for each year since 1968, investigators found no evidence for such a limit, and if such a maximum exists, it has yet to be reached or identified.
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New research suggests there is no detectable limit to how long people can live.
Credit: © pathdoc / Fotolia

Emma Morano passed away last April. At 117 years old, the Italian woman was the oldest known living human being.

Super- centenarians, such as Morano and Jeanne Calment of France, who famously lived to be 122 years old, continue to fascinate scientists and have led them to wonder just how long humans can live. A study published in Nature last October concluded that the upper limit of human age is peaking at around 115 years.

Now, however, a new study in Nature by McGill University biologists Bryan G. Hughes and Siegfried Hekimi comes to a starkly different conclusion. By analyzing the lifespan of the longest-living individuals from the USA, the UK, France and Japan for each year since 1968, Hekimi and Hughes found no evidence for such a limit, and if such a maximum exists, it has yet to be reached or identified, Hekimi says.

Far into the foreseeable future

"We just don't know what the age limit might be. In fact, by extending trend lines, we can show that maximum and average lifespans, could continue to increase far into the foreseeable future," Hekimi says. Many people are aware of what has happened with average lifespans. In 1920, for example, the average newborn Canadian could expect to live 60 years; a Canadian born in 1980 could expect 76 years, and today, life expectancy has jumped to 82 years. Maximum lifespan seems to follow the same trend.

It's impossible to predict what future lifespans in humans might look like, Hekimi says. Some scientists argue that technology, medical interventions, and improvements in living conditions could all push back the upper limit.

"It's hard to guess," Hekimi adds. "Three hundred years ago, many people lived only short lives. If we would have told them that one day most humans might live up to 100, they would have said we were crazy."

Story Source:

Materials provided by McGill University. Note: Content may be edited for style and length.


Journal Reference:

  1. Bryan G. Hughes, Siegfried Hekimi. Many possible maximum lifespan trajectories. Nature, 2017; 546 (7660): E8 DOI: 10.1038/nature22786

Cite This Page:

McGill University. "No detectable limit to how long people can live: New study finds no evidence that maximum lifespan has stopped increasing." ScienceDaily. ScienceDaily, 28 June 2017. <www.sciencedaily.com/releases/2017/06/170628131500.htm>.
McGill University. (2017, June 28). No detectable limit to how long people can live: New study finds no evidence that maximum lifespan has stopped increasing. ScienceDaily. Retrieved February 20, 2018 from www.sciencedaily.com/releases/2017/06/170628131500.htm
McGill University. "No detectable limit to how long people can live: New study finds no evidence that maximum lifespan has stopped increasing." ScienceDaily. www.sciencedaily.com/releases/2017/06/170628131500.htm (accessed February 20, 2018).

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