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词数:516阅读难度:★★★★☆建议阅读时间:7分钟The ancestors of modern humans interbred with Neanderthals and another extinct line of humans known as the Denisovans at least four times in the course of prehistory,according to an analysis of global genomes published on Thursday in the journal Science.The interbreeding may have given modern
Word Count: 516 Reading Difficulty: ★★★★☆ Suggested Reading Time: 7 minutes The ancestors of modern humans interbred with Neanderthals and another extinct line of humans known as the Denisovans at least four times in the course of prehistory,according to an analysis Of global genomes published on Thursday in the journal Science.The interbreeding may have given modern