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科学美国人60秒:尼安德河谷人-托福听力下载

2017-01-17 18:10:00来源：科学美国人60秒

点击查看>>科学美国人60秒音频：尼安德河谷人

　　科学美国人60秒中英文翻译：尼安德河谷人

　　科学美国人60秒英文文本

　　Neandertal Diners Had Side of Veggies

　　When it comes to Neandertal diets, the consensus has been: they ate meat. Lots of meat.But now it looks like Neandertals chomped on a fair amount of veggies, too.Researchers have had a tough time discerning the Neandertals’diet. They evaluated carbon and nitrogen isotopes in bones, but those only correspond to some general kinds of proteins. Even plant remains in Neandertal teeth could have gotten there because a tasty animal carcass itself contained traces of a last vegetarian meal.

　　尼安德河谷人食素.jpg

　　So the researchers relied on foolproof evidencethey studied Neandertal fecal remains from a site in southern Spain called El Salt. Neandertals made it their home about 50,000 years ago.The researchers analyzed the samples for chemical compounds that can only result from metabolizing cholesterol from meat or from metabolizing plants. All five samples showed evidence of meat consumption. But two revealed the digestion of plants.Meaning that Neandertals did try vegetation, likely tubers and nuts.

　　The study is in the journal PLoS ONE. Ainara Sistiaga et al, [The Neanderthal Meal: A New Perspective Using Faecal Biomarkers]The scientists intend to use the same technique to examine soil samples at a 1.8 million-year-old site in Tanzania. In the hopes that any remaining poop may deliver an ancestral-diet scoop.

　　—Cynthia Graberc

　　中文翻译请点击下一页

本文关键字: 科学美国人60秒 科学60秒下载 托福听力

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