一项利用化石DNA分析的新研究表明，马匹起源于北美。研究指出，一个此前被认为仅限于中国东北的已灭绝的马种——大连马，实际上分布范围更广，延伸至西伯利亚和雅库蒂亚。这种具有美国血统的大连马种充当了基因桥梁，将这些特征传递给古西伯利亚马种群，并随后传递给现代欧洲马的祖先。 AI
排序理由 该集群报道了一项新的化石DNA研究的发现，属于研究类别。[lever_c_demoted from research: ic=1 ai=0.1]
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Everyone knows the story: when Spanish conquistadors rode into the New World, Native Americans were stunned by a towering, four-legged creature they had never seen before. Horses, the theory goes, were a European import to the Americas. But a new fossil DNA study indicates that h…