Modern humans found to be fittest ever at survival, by far
Modern humans have gotten incomparably good at survival, doing more to extend our lives over the last century than our forebears did in the previous 6.6 million years since we parted evolutionary ways with chimpanzees, according to a new study.
In fact, humans in societies with plentiful food and advanced medicine have surpassed other species used in life-extending medical research in stretching our longevity and reducing our odds of dying at every point along our ever-lengthening life spans, the study finds.
The research, published online Monday by the journal Proceedings of the National Academy of Sciences, touches upon the hotly debated question of whether an upper limit to longevity is inscribed in our genes. It makes clear that life extension begins at birth, with a child born in the last four generations standing a better chance of being alive during infancy, adolescence, the reproductive years and after than in any of the 8,000 human generations that came before.
The study authors, from Germany's Max Planck Institute for Demographic Research, began by comparing people who have lived or now live in primitive hunter-gatherer societies around the globe in which life spans have been well documented with citizens of industrialized countries in Europe and Asia. A typical Swede, for instance, is more than 100 times more likely to survive to the age 15 than a typical hunter-gatherer. And a hunter-gatherer who has reached the ripe old age of 30 is about as likely to die in the following year as the world's champion of longevity — a 72-year-old woman in Japan.
http://www.latimes.com/news/science/la-sci-aging-biology-20121016,0,2921588.story
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