Michael Ryan, curator of vertebrate paleontology for the Cleveland Museum of Natural History, published the discovery in this month's Journal of Paleontology.

迈克尔·瑞安是克利夫兰自然历史博物馆古脊椎动物部门的负责人，他在本月的《古生物学杂志》上对外公布了这一新发现。

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The research, outlined in the latest issue of the Journal of Vertebrate Paleontology, strengthens the belief that snakes evolved from a lizard that either burrowed on land or swam in the ocean.

这一研究，刊登在最新出版的古脊椎动物杂志上，为的是进一步强调：蛇是由在陆上穴居和海洋里游泳的蜥蜴进化而来的。

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More elaborate dinosaur feathers had already been found, but "these structures were novel," says Xu, of Beijing's Institute of Vertebrate Paleontology and Paleoanthropology.

虽然科学家们已经发现了更为精细的恐龙羽毛化石，但徐星表示，北票龙的这些羽毛结构依然堪称新奇。

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