在2007年《朱鹭》杂志发表的回顾性研究中，研究人员查阅了回溯到19世纪后期的欧洲和北美洲鸟类期刊和其他的参考文献。
In a review study published in 2007 in the journal Ibis, researchers looked through European and North American bird journals and other references dating back to the late 19th century.
一些基因和年代测定的研究指出远古美国人可能来自其他地方，而且比北美洲的克伦维斯人来的早。
Some genetic and time-dating studies point to the possibility that ancient Americans came from other places and arrived earlier than Clovis sites in North America.
在北美洲，咖啡的饮用被第一次提到是在1668年，很快，咖啡馆就在纽约、费城、波士顿及其他城市相继出现。
The first reference to coffee being drunk in North America is from 1668 and, soon after, coffee houses were established in New York, Philadelphia, Boston and other towns.
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