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Star 洞穴里的 20 具骨架全是雌性——概率是 0.0000954%","homo-naledi-all-female-rising-star","# Rising Star 洞穴里的 20 具骨架全是雌性——概率是 0.0000954%\n\n## 目录\n\n- **一块牙釉质蛋白引发的追问**\n- **硬币抛了 20 次，全是正面**\n- **猩猩大小的脑子，却懂得区分「她」和「他」**\n- **男性 Homo naledi 在哪里？**\n- **蛋白质告诉我们的还不止这些**\n- **最后**\n\n---\n\n## 一块牙釉质蛋白引发的追问\n\n2013 年，南非的 Rising Star 洞穴系统里挖出了 20 多具小型古人类的遗骸。它们属于一个当时还不为人知的物种——*Homo naledi*。\n\n这本身就够震撼了。但接下来的问题是：这些人是自己掉进去的，还是被人特意放进去的？\n\n从 2013 到 2024，双方各执一词。直到一组牙齿蛋白分析的结果出来，才把天平彻底压向了一边。\n\nMax Planck 演化人类学研究所的 Palesa Madupe 和同事分析了 Rising Star 四个不同洞室出土的 23 颗 *Homo naledi* 牙齿——来自至少 20 个不同的个体，从刚出牙的婴儿到牙齿磨平的年长者。\n\n他们在所有样本中都找到了一种叫 AMELX 的蛋白质——它由 X 染色体编码。但没有一个样本含有 AMELY——那个由 Y 染色体编码的男性版本。\n\n20 个个体。全是雌性。\n\n![Homo naledi 的墓葬场景复原图](\u002Fapi\u002Fmedia\u002Fmedia_9b90f781ff0d)\n\n## 硬币抛了 20 次，全是正面\n\nMadupe 的团队计算了这纯粹是巧合的概率：大约 **0.0000954%**。相当于抛一枚硬币 20 次，每次都是正面朝上。\n\nJohn Hawks（威斯康星大学古人类学家，论文共同作者）说了一句很重的话：「没有自然的解释。」\n\n因为在自然界里，你找不到任何一个种群——人类、猿类、任何灵长类——其全部已知个体都恰好是同一个性别。就算你找黑猩猩和猩猩这种以雌性群体为主的社会结构，群体里也一定有各性别的幼崽。但 Rising Star 里连婴儿都是雌性。\n\n这枚硬币一定被动了手脚。动手脚的不是自然，而是智识——*Homo naledi* 在故意地把雌性同伴安葬在这片狭长曲折的地下黑暗里。\n\n考古学家的原话是：「很少有机会像这次一样，得到如此清晰的关于文化的证据。」这是一个 33.5 万到 23.6 万年前的物种，在用自己的方式说——**她值得被单独放在这里**。\n\n## 猩猩大小的脑子，却懂得区分「她」和「他」\n\n*Homo naledi* 的脑容量大约和黑猩猩相当——450cc 左右。但它的脑部形状和组织方式却和现代人类更像。\n\n如果 Berger 团队的墓葬假说成立，这意味着一个只有黑猩猩脑容量大小的物种，不仅有了「死亡」的概念，还在死亡场景里融入了**性别**这个维度。\n\n不是随机的，不是自然事故。它们在一个死了之后还能被「安排」的层面上，区分了雌性和雄性，并把其中一边单独安置在一个需要爬过 12 米深的狭窄竖井才能到达的地下空间里。\n\n你说这不是文化，那什么才是？\n\n![Homo naledi 的复原图，由 Kiona Smith 绘制](\u002Fapi\u002Fmedia\u002Fmedia_767363e39505)\n\n## 男性 Homo naledi 在哪里？\n\n这引出另一个问题：男性个体去哪了？\n\n科学家一度以为 *Homo naledi* 的两性体型差异极小——几乎看不出性别二态性。现在看来那只是因为样本里根本就没男性。**我们至今不知道男性 *Homo naledi* 长什么样。**\n\nJohn Hawks 有一个猜测：男性可能在洞穴的另一个区域，或者其他相邻遗址里。他和团队在过去几年里挖到了一些其他骨骼，或许保存得更好。如果序列分析技术足够进步，也许很快就能用古 DNA 从那些骨骼里读出答案。\n\n但在那之前，古人类学面临一个相当奇怪的局面：我们知道一个物种的女性长什么样、怎么被安葬、吃什么、活多久，但对它的男性一无所知。\n\n## 蛋白质告诉我们的还不止这些\n\n除了性别，这组牙齿蛋白分析还回答了一个更根本的问题：*Homo naledi* 到底和我们是什么关系？\n\n它的脸、手和腿看起来更像晚期古人类，躯干却更像猿类和更早期的南方古猿。它用两条腿走路的方式和我们几乎一样，但又保留了大量爬树的能力。它的脑子像黑猩猩一样小，但形状和组织却更像智人。\n\n蛋白分析给出了两个数据点：\n\n- 20 个个体中的 5 个，与 *Paranthropus robustus*（一个 200 万到 100 万年前的更早期人科）共享同一蛋白质变体\n- 15 个个体拥有一种似乎只属于 *Homo naledi* 的蛋白质变体\n\n这不足以绘制人科谱系树，但它是一个诱人的线索。哥本哈根大学的 Enrico Cappellini 希望下一步能测序更多南非古人类的蛋白质——肯尼亚、坦桑尼亚、埃塞俄比亚的物种。如果那种 「*naledi*-特异」的蛋白质变体真的是独有标记，它就能用来确认其他化石的身份。\n\n唯一的问题是：这些信息藏在牙齿的牙本质里——比牙釉质包含更多蛋白质，但需要更深的切割。这意味着要在极其稀有且不可替代的化石上冒风险。\n\n## 最后\n\n20 个个体全部雌性。20 次硬币抛掷全是正面。一个 30 万年前的物种，在没有语言、没有文字、只有黑猩猩级别脑容量的情况下，做了一件人类直到新石器时代才系统化的事——墓葬，且按性别分类。\n\n让我觉得最有趣的点不是「它们做到了」，而是「它们为什么要这么做」。性别是一个概念。概念需要被抽象出来、被命名、被赋予意义，然后才能在仪式中被使用。当你在一个 30 万年前的洞穴里看到 20 具雌性骨架时，你看到的不只是骨骼，还有一个在演化文档里几乎看不到的东西——**一个物种最早期的心智。**\n","# Rising Star 洞穴里的 20 具骨架全是雌性——概率是 0.0000954%\n\n## 目录\n\n- **一块牙釉质蛋白引发的追问**\n- **硬币抛了 20 次，全是正面**\n- **猩猩大小的脑子，却懂得区分「她」和「他」**\n- **男性 Homo naledi 在哪里？**\n- **蛋白质告诉我们的还不止这些**\n- **最后**\n\n---\n\n## 一块牙釉质蛋白引发的追问\n\n2","\u002Fapi\u002Fmedia\u002Fmedia_9b90f781ff0d",5,3,"2026-06-26 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