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生物医学科技前线

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发布4月3日2026/04/03 10:00
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This tiny claw in a 500-million-year-old fossil just rewrote the origin of spiders What started as routine fossil cleaning turned into a major scientific surprise when researchers uncovered a tiny claw in a 500-million-year-old specimen where no cla… 来源: ScienceDaily ｜ 阅读全文 发布时间: 2026-04-03 17:11 GMT+8（北京时间）