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  "path": "/scientists-say-your-fingers-hold-a-secret-of-brain-evolution/",
  "publishedAt": "2026-02-17T21:47:38.000Z",
  "site": "https://scitechdaily.com",
  "tags": [
    "Biology",
    "Developmental Biology",
    "Estrogen",
    "Hormones",
    "Swansea University"
  ],
  "textContent": "The secret to how our brains grew may be hidden in our fingers before we are even born. One of the defining features of human evolution is the steady expansion of our brains. New findings suggest this growth may be partly linked to higher levels of estrogen before birth. Surprisingly, a visible clue may lie [...]",
  "title": "Scientists Say Your Fingers Hold a Secret of Brain Evolution"
}