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  "path": "/biology/chin-evolution-body-part-function-human/",
  "publishedAt": "2026-03-27T23:47:44.000Z",
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  "tags": [
    "Continue Reading",
    "Biology",
    "Science",
    "Evolution",
    "Human"
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  "textContent": "Male nipples. Whale pelvic bones. Vestigial hind limbs in snakes. Evolution is full of features that look purposeful. But upon closer inspection, science tells us that they are actually by-products of development and shifting gene expression. New research suggests the human chin may be one such evolutionary spandrel, a term biologists use for a trait that emerges as a consequence of other changes rather than as a direct adaptation.\n\nContinue Reading\n\n**Category:** Biology, Science\n\n**Tags:** Evolution, Human",
  "title": "Chins are unique to humans and possibly an evolutionary accident"
}