您现在的位置: 首页 > 英语听力 > 媒体资讯 > 60秒科学 > 正文

60秒科学:史前第一刀

时间:2010-08-12 16:22:55 来源:scientificamerican 编辑:sunny  每天三分钟英语轻松学

| 收藏

评论  打印 字号: | |  

这看起来像是我们的祖先懂得收集有着锋利边缘,可以用来切肉的工具,就好像小孩子们懂得挑选扁平的石头用来打水漂一样。但是未来的考古工作致力于寻找把石头塑造成厨具的工具。相信三百四十万年后,露西跟她的伙伴们会不断给我们带来惊喜。

There’s nothing like a good steak. And our Australopithecus afarensis ancestors apparently felt the same way. Because new discoveries from Ethiopia show that what was likely the species of the famous fossil Lucy used stone tools to butcher meat from big mammals—about 3.4 million years ago. That’s a million years earlier than our best previous evidence for human ancestor stone tool use and meat eating. The finding appears on the cover of the journal Nature. [Shannon P. McPherron et al., http://bit.ly/dzCs4d]

The research team found two fossil bones with cut and scrape marks, signs of meat carving. One bone was a piece of rib from a cow-sized mammal; the other, a leg bone fragment from a mammal the size of a goat. The bones also had percussion marks, sustained while Lucy’s friends smashed the bones to get at the marrow.

It looks like the ancient tool users collected stones that happened to have shapes conducive to butchering, the way kids select particular stones with good potential to skip on water. But future expeditions will look for evidence for any attempts at shaping stones into kitchen utensils. Because after 3.4 million years, Lucy and her fellow afarensis keep surprising us.

—Steve Mirsky

[The above text is an exact transcript of this podcast.]

收藏

相关热词搜索: 60秒科学

上一篇:名师汇总:中级口译历年真题听力原文合集(9)

下一篇:Waiter From Hell来自地狱的侍者

您可能还感兴趣的文章

60秒科学:火蚂蚁如何漂浮过河
研究发现,火蚂蚁在水中不会淹死。Take a fire ant—don’t forget your gloves. Toss it in water, and it’ll eventually drown. But throw a group of fire ants into

时间:2011-04-28 编辑:

60秒科学:厨房工作人员与食物安全储存
听力练习研究发现,给厨师讲食品安全故事,比生硬的安全规定要有用多了。Kitchen staff learned more from food safety stories about methods and consequences than fr

时间:2010-12-20 编辑:

60秒科学:交通噪音增加中风的风险
听力练习丹麦一项研究发现,对65岁以上的人来说,街上声音每增长10分贝,中风的风险就会增加27%。Living in the city, you can't escape traffic noise. But it's not ju

时间:2011-01-28 编辑:

60秒科学:老者吐真言Elderly with Cognitive Dec
听力练习Elderly people with loss of executive function--lessening of inhibitions--are more likely to offer useful, but tactless, advice. Christopher Intagliat

时间:2010-09-19 编辑:

最新文章

无觅相关文章插件,快速提升流量