The microbes that live in and on humans may have evolved to preferentially take down the elderly in the population, a new computer model suggests. That, in turn, could have allowed children a greater share of food and resources, thereby enabling an extended childhood. Such a microbial bias may also have kept the first human populations more stable and resilient to upheavals, the findings suggest.
Read more: http://snapzu.com/drunkenninja/did-microbes-shape-the-human-life-span
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