The fossil consists of a complete skull of an archaeocyte, an extinct group of ancestors of modern cetaceans.
“巴基鲸”化石由一个原细胞的完整头盖骨所组成,这是现代鲸类祖先中已经灭绝的一个物种。
Geigl and her colleagues looked at 3200-year-old fossil bones belonging to a single individual of an extinct cattle species called an aurochs.
盖格尔和她的同事们研究了3200年前的骨头化石,这些骨头属于一种已经灭绝的叫做欧洲野牛的种类。
It may look like a cross between a seal and an otter; but an Arctic fossil could, scientists say, hold the secret of seal evolution in its feet.
海豹和水獭的进化之间可能有交叉,但是科学家称,北极发现的一具化石可能揭开海豹的腿进化的秘密。
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