Aging, fertility, and immortality
نویسندگان
چکیده
منابع مشابه
Aging, fertility, and immortality.
Evolutionary theory suggests that fecundity rates will plateau late in life in the same fashion as mortality rates. We demonstrate that late-life plateaus arise for fecundity in Drosophila melanogaster. The result qualitatively fits the evolutionary theory of late life based on the force of natural selection. But there are a number of alternative interpretations. Fecundity plateaus could be sec...
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We investigate a model of cell division in which the length of telomeres within a cell regulates its proliferative potential. At each division, telomeres undergo a systematic length decrease as well as a superimposed fluctuation due to exchange of telomere DNA between the two daughter cells. A cell becomes senescent when one or more of its telomeres become shorter than a critical length. We map...
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In the United States since 1980, the birth rate in women aged > 35 years has increased by nearly 60%, whereas the birth rate for women aged 20 to 34 years has increased by only 10%. The trend in parenthood at an older age has also been seen in men. Since 1980, the fertility rate for men in their 30s has increased by 21% and for men aged 40 years and older, the rate has increased nearly 30%. In ...
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“Is death necessary?“, asked biologist G. R. Taylor and stated that in 1968 in the USA alone more than a thousand teams of scientists were working on the issue of growing old and the problem of death. Some people are frozen at their death. They want to be revived as soon as a cure for their disease or the aging process has been found. Most of humanity seems to have the desire to live forever. M...
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The death of our universe is as certain as our individual death. Some cosmologists have elaborated models which would make the cosmos immortal. In this paper, I examine them as cosmological extrapolations of immortality narratives that civilizations have developed to face death anxiety. I first show why cosmological death should be a worry, then I briefly examine scenarios involving the notion ...
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ژورنال
عنوان ژورنال: Experimental Gerontology
سال: 2003
ISSN: 0531-5565
DOI: 10.1016/s0531-5565(02)00148-1