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总结
多家媒体报道，一项针对约700万年前“萨赫勒人”(Sahelanthropus)化石的新骨骼分析提出，这一古人类可能已具备直立行走特征，或成为人类与黑猩猩谱系分化后最早期的潜在祖先之一。研究据称通过骨骼形态与受力特征推断双足行走能力，为人类起源时间线提供新证据，但学界仍对样本归属、保存状态与推断方法提出质疑，结论有待更多化石与独立研究验证。
正文
Study identifies our likely earliest ancestor after split from chimp Haaretz 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 Evidence of upright walking found in 7-million-year-old Sahelanthropus fossils Phys.org
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