其实更早，美国发现过人的化石脚印，五万年前的人类脚印！但是文明是从会制造工具开始，所以只能算两万年。

来源: 咲媱于 2026-03-12 09:24:39 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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