Radiocarbon dating of fossils taken from caves on islands along southeastern Alaska's coast suggest that at least a portion of the area was remaining ice-free during the last ice age.

从阿拉斯加东南海岸岛屿的洞穴中提取的化石的放射性碳年代测定法表明，在最后一个冰河时代，该地区至少有一部分保持无冰状态。

youdao

There are two key fossils called Proganochelys quenstedti and Palaeochersis talampayensis dating from early dinosaur times, which appear to be close to the ancestry of all modem turtles and tortoises.

原颚龟化石（Proganochelys quenstedti） 和古老陆地龟化石（Palaeochersis talampayensis） 这两种重要化石最早可以追溯到恐龙时代，它们与所有现代海龟和乌龟的祖先最为接近。

youdao

He starts at their beginning with a weighty introduction that looks at fossils dating back to the dinosaurs, the structure of feathers and the evolution of birds.

通过大量介绍恐龙时代的化石，他开始描述最初的羽毛结构和鸟类进化的开端。

youdao

For the past century in Ethiopia, Kenya, Tanzania and South Africa, ancient fossils dating back millions of years continue to emerge suggesting a common ancestor for humans.

CNN: African roots of the human family tree

Evidence of the first dispersal comes from the site of Dmanisi in Georgia, where numerous hominid fossils dating to 1.75 million years ago have been unearthed.

BBC: 'Peking Man' older than thought