www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

English 中文網 漫畫網 愛新聞iNews 翻譯論壇
中國網站品牌欄目(頻道)
當前位置: Language Tips > Normal Speed News VOA常速

Meat was main dish for early humans

[ 2012-10-09 10:39] 來源:中國日報網     字號 [] [] []  
免費訂閱30天China Daily雙語新聞手機報:移動用戶編輯短信CD至106580009009

Get Flash Player

Download

Modern-day humans eat a lot of meat. Some nutritionists say perhaps too much. But fossils in Tanzania indicate that early humans considered meat a dietary staple much earlier than first thought. What’s more, meat may have played a major role in evolution.

At least one and a half million years ago, humans considered meat a main dish, not just occasional fare. That’s very big news to archeologists. The evidence is found in skull fossil fragments of a young child discovered in Tanzania’s Olduvai Gorge. What evidence is that? We’ll find out after we consider the mystery of meat.

Professor Manuel Dominguez-Rodrigo of Madrid’s Complutense University has been searching for clues about early humans for 20 years. He’s been digging around the gorge since 2006, after analyzing fossils found by the famous British archeologist and anthropologist Mary Leakey.

“There was an increasing amount of evidence that early humans pretty much around two million years ago were eating meat. And archeologists over the past 50 years have been debating two main questions. One, was meat an important element in the diet of these hominids or was it just a complimentary element like you might see in modern chimpanzees, for instance? And question number two is --whether it was important or not – how did they acquire this meat. Did they hunt the animals they were eating? Did they scavenge the animals they were eating?”

Archeologists know from sites in Ethiopia that human ancestors ate meat as far back at two-point-six million years ago. But there are so few bone fragments from that time with primitive knife marks on them that it’s unclear how often meat was consumed.

Now, they can confirm that it was indeed a regular staple of the diet at least one-and-a-half million years ago. Dominguez-Rodrigo says it tells a lot about the social habits of early humans and much more.

“Getting meat in a Savannah ecosystem, in a Savannah environment, is not something simple for a primate. It is something that requires planning. Something that requires cooperation. Something that requires a complex social organization. We were not sure how these early humans behaved in that regard. It is important because this is happening pretty much at the same time period as we see that the brain starts developing, starts growing, compared to previous hominids. And brain growth has important nutritional requirements and some of them are the vitamins that are associated with meat eating,” said Dominguez-Rodrigo.

He’s talking about B vitamins and that’s where the skull fragments come in. Scientists know from studying the remains of humans over the centuries that dietary deficiencies leave traces in bone. The fragments belonging to a one or two year old child had bone lesions commonly associated with a lack of B vitamins. In other words, the lesions indicate the child was anemic from not eating enough meat.

“We don’t find these pathologies commonly in populations that live on hunting and gathering, because the diet of hunter / gatherers is actually more beneficial for human metabolism than the diet of producers. So our surprise was to find that this pathology typical of sedentary populations actually was found in a prehistoric hunter-gatherer individual that was 1.5-million years old,” he said.

Dominguez-Rodrigo realizes the findings will not make vegetarians very happy.

“I’m fully aware of that, yes, (laughs). We find vitamins, we find folic acid, we find vitamin B-12 now everywhere in the cereals that we eat in the morning and in many other foods that we take because a lot of that has been artificially produced. But in nature, if we were living on whatever we’re able to obtain by living in a Savannah in Africa B-12 can only be obtained in meat,” he said.

The archeologist describes meat as “a crucial element in becoming human.”

相關閱讀

American history: A new world clash of cultures

FTC takes on computer scareware scammers

Femen's topless protest tactics hit Paris(視頻)

Cheating scandal threatens Harvard's image

(來源:VOA 編輯:Julie)

 
中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883631聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。
 

關注和訂閱

人氣排行

翻譯服務

中國日報網翻譯工作室

我們提供:媒體、文化、財經法律等專業領域的中英互譯服務
電話:010-84883468
郵件:translate@chinadaily.com.cn
 
 
主站蜘蛛池模板: 亚洲欧美日韩精品永久在线 | 亚洲免费视频一区二区三区 | 麻豆第一页 | 国产精品久久成人影院 | wwwxx在线| 爱爱客影院在线影院gf发现 | 性刺激久久久久久久久 | 亚洲免费三级 | 91寡妇天天综合久久影院 | 91精品手机国产露脸 | 国产观看在线 | 亚洲国产亚洲片在线观看播放 | 欧美日韩亚洲综合在线一区二区 | 久草国产在线播放 | 全国男人天堂网 | 精品丝袜国产自在线拍亚洲 | 欧美在线视频免费 | 国产日产欧美a级毛片 | 欧美精品高清在线观看 | 国产欧美日韩在线 | 91精品成人福利在线播放 | 国产大乳喷奶水在线看 | 看中国一级毛片 | 一级毛片q片 | 国产一级片视频 | 欧美日韩顶级毛片www免费看 | 亚洲系列在线 | 国产精彩视频在线观看 | 日韩在线手机看片免费看 | 亚洲欧美日韩国产精品 | 国产精品二区高清在线 | 亚洲一区国产 | 久久九九爱 | 91福利国产在线观看香蕉 | 久久久精品国产免费观看同学 | 亚洲 欧美 91| 国产一级毛片网站 | 99re热精品视频国产免费 | 美国毛片网站 | 欧美成人免费在线观看 | 久久久久免费观看 |