|
( Maximum lifespan)
Maximum life span is a measure of the maximum amount of time one or more members of a group has been observed to survive between birth and death. In animal studies, maximum life span is often taken to be the mean life span of the most long-lived 10% of a given cohort. By another definition, however, maximum life span corresponds to the age at which the oldest known member of a species or experimental group has died. Calculation of the maximum life span in the former sense depends upon initial sample size.[1] The oldest recognized person on record is Jeanne Calment, a French woman who lived for 122 years and 164 days. Maximum recorded life span for humans has remained about 105-122 calendar years throughout recorded history, despite steady improvements in life expectancy. Reduction of infant mortality has accounted for most of this increased average longevity, but since the 1960s mortality rates among those over 80 years have decreased by about 1.5% per year. Advances in medicine[which?], calorie restriction with adequate nutrition, or other interventions are said to have slowed the aging process. Although calorie restriction has not been proven to extend the maximum human life span, as of 2006, results in ongoing primate studies are promising.[3] Small animals such as birds and squirrels rarely live to their maximum life span, usually dying of accidents, disease or predation. Grazing animals accumulate wear and tear to their teeth to the point where they can no longer eat, and they die of starvation.
|
Maximum lifespan Subcategories
Maximum lifespan Articles
|
| 
