EPISODE · Apr 28, 2026 · 19 MIN
861. 人眼起源：远古“独眼巨人”的演化踪迹
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这项研究揭示了人类及其他脊椎动物眼睛的演化奇旅，其源头可追溯至约六亿年前的一种单眼蠕虫状祖先。这种被称为“中眼”的单一眼点在生物从静止转为活跃生活的过程中，逐渐演变成了如今复杂的双眼结构。有趣的是，这一古代器官的残余并未消失，而是转化为了人类大脑中的松果体。目前，松果体仍通过分泌褪黑素来调节我们的昼夜节律和睡眠周期。这一发现解释了为何脊椎动物的视网膜起源于大脑组织，从而与昆虫等生物的视觉演化路径截然不同。
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861. 人眼起源：远古“独眼巨人”的演化踪迹
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