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总结
多家外媒报道，研究人员近期通过对一批早期“人类祖先”相关化石骨骼进行新的分析，提出在人类与黑猩猩谱系分化后不久，某个颇具争议的祖先类群可能已出现与人类相似的关键特征，甚至可能具备双足行走能力。该结论被视为对“人类何时迈出第一步”的新线索，但报道同时指出样本有限、化石归属与证据解释仍存分歧，学界对其是否足以改写早期人类演化时间线保持谨慎，仍需更多材料验证。
正文
Controversial Ancestor Found to Have Done Something Eerily Human ScienceAlert When did humanity take its first step? Scientists say they now know. The Washington Post Fresh bone analysis makes case for earliest 'ancestor of humankind', but doubts remain The Guardian Earliest Human Ancestor May Have Walked on Two Legs Scientific American Study identifies our likely earliest ancestor after split from chimp Haaretz
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