Jeanne L
ouise Calment died in 1997 after 122 years and 164 days of active life. She had the longest (reliably reported) lifespan for any human being in history (February 21, 1875 - August 4, 1997). Her lifespan has been thorouhly documented by scientific studies.But her feat will fade if the predictions of some biologist and demographers are right. The extending of life in some species such as mushrooms and mices, and their extrapolation to human life expectancy seems to convince much of the scientific community that humans will routinely live between 100 and 110 years. Others, however, think that the elasticity found in other species can not apply to us.
On the other hand, since more than a decade is known the existence
of an unique creature among all. This is the jellyfish Turritopsis nutricula, which is inmortal. Since it discovery, this jellyfish has been subjected to genetic and biological analysis of all types to try to rip off, without success, the secret of its immortality. You can find detailed online articles about its biology and characteristics, e.g. the one published by Piraino et al in Biol. Bull. 190: 302-312 (June, 1996).This gives much food for thought!