According to 2021 data from the World Health Organization, the average global life expectancy is 71.4 years. That number doesn't seem like much on the scale of animals that live the longest, but ...
Paleoanthropologists Rachel Caspari and Sang-Hee Lee found that the ratio of older-to-younger adults among early modern humans was more than five times higher than among Neandertals, a shift that ...
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