The topic of immortality has been concerned by many people since ancient times. Everyone wants to live a long and healthy life. How long can we live? What's the maximum limit of human life? Actually, Xiaobian thinks that long life is a good thing, but we must get some quality. Otherwise, it's walking dead!
The researchers found that although the curve representing the trend of change in the highest life expectancy is still extending upward, it will eventually encounter a 'ceiling'. The maximum life expectancy of human is 115 years, and 125 years is the absolute upper limit of human life.
Whether it's emotional impression or objective facts, it seems that human beings live longer and longer. Not long ago, scientists from Albert Einstein School of medicine, the top medical research center in the United States, pointed out in a paper published on the nature website that human beings are unlikely to live longer than the world's oldest known people, and even if science and medicine continue to develop in the future, they may not be able to do anything about it. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/jiankang.html)
Maximum life has reached the upper limit
Since the beginning of the last century, with the development of diet, environment, medical treatment and various fields, the average life expectancy of human beings has been increasing.
However, researchers at Einstein Medical School found that although the curve representing the change trend of maximum life expectancy is still extending upward, it will eventually meet a 'ceiling', and human beings have almost reached that ceiling. "Demographers and biologists have no reason to believe that the longest life expectancy will no longer continue to grow," said Jan vijg, the article's co-author. But our data strongly suggest that the longest life span of human beings has reached the upper limit as early as the 1990s. '
Jan vijg and colleagues analyzed data from the human mortality database, which produced mortality and population data for more than 40 countries. The results show that since 1900, the mortality rate of the elderly population (over 70 years old) has generally decreased in these countries: if the elderly population is grouped according to their specific year of birth, the later the year of birth, the more people they survive to old age, which also proves that their average life expectancy is increasing. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/jiankang.html)
But if you look at the growth of people aged 100 and over since 1900, regardless of the year of birth, the researchers found that the growth peaked around the age of 100 and then declined rapidly. Jan vijg explained: 'this finding indicates that the rate of decline in mortality in old age is slowing, and that human life expectancy may be at the upper limit. '
Their conclusions are further supported by the results of the analysis of the 'maximum reported age of death' in the international life expectancy database. From 1968 to 2006, the death age of the people who lived to 110 years or older confirmed in the United States, France, Japan and the United Kingdom increased rapidly from the 1970s to the early 1990s, but began to stabilize around 1995, which further confirmed the existence of the upper limit of human life. The researchers noted that this stable value appeared close to 1997, the time when the French Jeanne Calment, 122, died, the longest living person on record in human history.
Therefore, they propose that the maximum life expectancy of human beings is 115 years old, while 125 years old is the absolute upper limit of human life, which is absolutely impossible to be higher. It means that the probability of anyone in the world living to the age of 125 is less than one in ten thousand. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/jiankang.html)
'the maximum life span of human beings is about 120'
As early as 2005, science magazine, in order to celebrate the 125th anniversary of its founding, solicited 125 questions from scientists around the world to be answered, one of which is "how long can human life be extended?".
With regard to the maximum life span, he Qiyang, a researcher at the Institute of medical biotechnology, Peking Union Medical College, Chinese Academy of Medical Sciences and chairman of the Scientific Committee on aging and anti-aging of the Chinese society of Gerontology, told reporters: 'according to the population records and scientific experimental evidence, the maximum life span of human beings is about 120 years old. '
He gave the following three aspects of evidence: first of all, the world's academic circles recognized that the oldest person in human history is Jeanne Calment, a Frenchman, aged 122; second, Hayflick L, a famous American aging research expert, according to the life span of human embryonic lung fibroblasts for 50 generations, each division can produce new cells that can survive for 2.4 years, then die, continue the next division, and put two Three, according to the observation of life span of many kinds of animals, Buffon, a French naturalist, summed up the basic formula that the life span of species is 5-7 times of its growth period. If the growth and development period of human is calculated at 18 years old, it is 126 years old according to the maximum 7 times, which is close to 120 years old. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/jiankang.html)
As for the latest results published by Jan vijg, some scientists objected that with the progress of science, the maximum life expectancy of human can be further improved, and cited the control genes or diet restrictions that have been found in online worms and animals to improve life expectancy.
Jan vijg objected. He pointed out that the results of experimental animals may not be feasible for human beings, and their own artificial environment has interfered with the growth of these experimental animals. He pointed out: 'I don't deny that drugs and tissue engineering have a great benefit in prolonging our life expectancy, but can these measures really help us to break the age limit of 115? I don't think it's possible. '
Chen Ke, Ph.D., from Beijing Institute of genomics, Chinese Academy of Sciences, expressed a similar view in an interview with China Science Daily. He pointed out: 'in animals, if we want to reach people, we can only say that there is possibility. '
Chen Ke pointed out: 'after the World Health Organization (who) conducted a systematic analysis of human health and longevity factors, the result is that each person's health and longevity, 60% depends on himself, 15% depends on genetic factors, 10% depends on social factors, 8% depends on medical conditions, 7% depends on the impact of climate and environment. '