Study finds that women have always lived longer than humen
Study Finds That Women Have Always Lived Longer Than Humen
Image: Blend Images/ AP
Men still aren’t living as long as women and that holds true for humans’ primate cousins as well, a new analyze shows.
In the study, researchers looked at data regarding six populations of humans from both modern and historical periods, in different countries. The researchers found that, “in spite of the enormous gains in human longevity over the past century, the male-female change has not shrunk, ” said Susan Alberts, a professor of biology at Duke University and a co-author of the new study.
The researchers did find that the the amount by which females outlived men varied across populations. For instance, the largest male-female change in life span among the populations analyzed was in modern-day Russia, where the gap is approximately 10 years. Much smaller differences were found in other populations such as people living in modern-day Nigeria and India.
Additionally, the scientists found that the gap for nonhuman primates was much smaller than it was for humans.
In the study, the researchers looked at the mortality of six different human populations that represented “the full range of human experience.” The scientists described information about three generally long-lived populations from a large international database called the Human Mortality Database, including the Swedish population from 1751 to 1759, the Swedish population from 2000 to 2009 and the Japanese population in 2012.
The researchers also looked at data regarding three populations with generally much less lives, including two modern hunter-gatherer populations, the Hadza of Tanzania and the Ache of Paraguay, as well as data regarding its own population of liberate slaves, who migrated from the U.S. to Liberia between 1820 and 1843.
For nonhuman primates, the researchers looked at data collected from six wild populations of sifakas, muriquis, capuchins, gorillas, chimpanzees and baboons, each with its own population somewhere between about 400 and 1,500.