Blushing Response

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True Likely Speculative

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Human Uniqueness Compared to "Great Apes":

Speculative Difference

MOCA Domain:

Organ Physiology

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Many fair-skinned humans express a "blushing" response to situations of personal embarrassment, but susceptibility to this response is highly variable. In Chapter 13 of Darwin's "The Expression of the Emotions in Man and Animals", he described blushing as "... the most peculiar and most human of all expressions."

But is this physiological response present in all humans? Very dark skin in humans or hair on great apes may make it difficult to detect such a response.