Question for ev bio people about the handicap principle in sexual selection.pic.twitter.com/DWVJi864Ez
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@sarahdoingthing @adamdangelo Facial symmetry is a signal of a strong immune system(?), but isn't costly to carry around. Just hard to fake.
@KevinSimler @adamdangelo yup see previous link - it's possible but not universal, as in human economic systems
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