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总结
多家媒体报道，一项最新研究重新分析一具约700万年前的古猿化石，发现骨骼上一个细小的隆起等形态特征，指向其可能具备直立行走或部分双足行走能力。研究者据此认为，灵长类双足行走的起源时间或早于以往主流判断，并不排除该个体处在人类与其他类人猿分化早期谱系附近，甚至可能接近人类祖先。该结论若被更多证据支持，可能改写人类演化时间线与早期行为方式的认识。
正文
Tiny bump on 7 million-year-old fossil suggests ancient ape walked upright - and might even be a human ancestor Live Science A 7 Million-Year-Old Fossil Could Rewrite Human History SciTechDaily News - When Did Bipedal Walking Begin? Archaeology Magazine Earliest Human Ancestor May Have Walked on Two Legs Scientific American A new analysis reveals clues about when primates started walking on two feet NPR
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