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人类大脑如何变得如此庞大和复杂一直是一个谜团。美国加州大学旧金山分校的Katherine Pollard团队发现，将一段仅存在于人类基因组中的遗传片段插入小鼠体内后，它们的大脑会长得比通常情况更大。2025年5月14日，相关研究成果发表于《Nature》。

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（图片来源：《精灵鼠小弟2》）

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