The most interesting thing I've learned this week is that humans are the only species of primate (besides for a subset of gorillas) that have a white eyeball.
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similarly, we may have developed high foreheads, in part, to better show off our expressions and our thoughts.https://www.vox.com/science-and-health/2018/4/9/17206448/eyebrows-forehead-science-anthropology-nature-study …
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