We’ve had plenty of reasons to discuss decreasing birth rates and declining population trends recently, particularly among more westernized and industrialized nations. Several plausible explanations have been offered, including a reluctance among younger generations to take on the responsibilities of parenthood or simply adulthood in that fashion. Some societies such as China even mandated radically smaller families for a period of time, only to reverse those policies later. But even in countries without such restrictions, similar contractions were observed. Why is that? One new study from researchers at the University of Illinois-Chicago suggests that we’re not actually seeing some results driven by social factors but by inherent physical limitations. They suggest that humans may be running into a type of evolutionary firewall, where humans are reaching our capacity to age past…
Don’t Expect Human Life Expectancy to Grow Much More – HotAir
