Increased Human Life Expectancy Relatively Recent

Most occurred in the last century or so

FRIDAY, Oct. 19 (HealthDay News) -- Most of the increase in human life expectancy has occurred in the last four generations, out of the roughly 8,000 generations that have ever lived, according to a study published online Oct. 15 in the Proceedings of the National Academy of Sciences.

To investigate increases in human life expectancy in an evolutionary context, Oskar Burger, Ph.D., from the Max Planck Institute for Demographic Research in Rostock, Germany, and colleagues compared mortality patterns in modern-day hunter-gathers and low-mortality populations.

The researchers found that the mortality profile of hunter-gatherers was closer to wild chimpanzees than to low-mortality populations such as Japan and Sweden. Most of the reduction in mortality in low-mortality populations occurred over four generations since 1900. This improvement in lifespan is similar to those observed in longevity experiments in fruit flies, worms, and mice.

"The prediction that late-life mortality is determined by deleterious mutations that progressively accumulate as the force of selection declines with age is difficult to reconcile with the finding of exceptional environmentally driven malleability in mortality at all ages," Burger and colleagues conclude.

Abstract
Full Text

Copyright © 2012 HealthDay. All rights reserved.

Powered by

jQuery UI Accordion - Default functionality

For life-long learning and continuing professional development, come to Lippincott's NursingCenter.

Nursing Jobs Plus
Featured Jobs
Recommended CE Articles Recommended Nursing Articles

What internal motivators drive RNs to pursue a BSN?
Nursing2014 , October 2014
Free access will expire on November 24, 2014.


Breast Cancer Risk Assessment in Primary Care
MCN, The American Journal of Maternal/Child Nursing, September/October 2014
Free access will expire on November 10, 2014.


Nurses spurring innovation
Nursing Management, October 2014
Free access will expire on November 10, 2014.


More Recommended Articles

Subscribe to Recommended Articles

Evidence Based Practice Skin Care Network NursingCenter Quick Links What’s Trending Events