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What makes human brains special?

Our brains stand out thanks to a unique gene, SRGAP2, which slows down the development of crucial immune cells called microglia. This extended maturation period, lasting four to eight years, is thought to be key. It allows for more complex coordination with neurons, potentially building the denser, stronger brain connections that underpin our unique intelligence.

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Human-only gene slows brain cell growth, boosting our unique intelligence

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