科学美国人60秒:猛玛象化石雄性居多
日期:2018-03-09 11:50

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听力文本

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This is Scientific American — 60-Second Science. I'm Christopher Intagliata.
Woolly mammoths once ruled the northern reaches of our planet—roaming from Portugal to Siberia, and beyond to Alaska, Canada and the American Midwest. And the massive beasts left lots of fossil evidence of their occupation.
But now scientists have noticed a strange trend among those mammoth remains. The researchers genetically analyzed the fossilized bones, teeth and tusks of 98 individual Siberian mammoths. And they found that 70 percent of the mammoths...were males.
"So essentially we think this is driven by two different things." Love Dalén, a paleogeneticist and professor at the Swedish Museum of Natural History in Stockholm. "In general, in wild animals, males tend to be more risk-taking."

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猛玛象.jpg
The second thing, if modern elephant culture is any indication, is that male mammoths may have been solitary loners. More likely to crash through thin ice and sinkholes, or get caught in a mudslide than females. These types of death are more likely to become preserved—so those are the remains that we find today. The study is in the journal Current Biology.
Dalén says this is an important reminder that the fossil record is far from complete. "The fossils we find might not always be representative of the species back when it lived." But with a little detective work, even seemingly random remains have much to reveal.
Thanks for listening for Scientific American — 60-Second Science Science. I'm Christopher Intagliata.

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参考译文

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这里是科学美国人——60秒科学O85!-w*OS]a=IJ|nz#p。我是克里斯托弗·因塔利亚塔_Kcv5h!+ZSI8x
长毛猛犸象曾经统治着地球的北部区域——从葡萄牙到西伯利亚,再至阿拉斯加、加拿大和美国中西部,都有它们的足迹Q|Arc1Rj_dJAyN+。这些巨兽留下了大量的化石证据,以此证明它们的存在IFR5(ra7VGd*
而现在科学家注意到猛犸象遗骸中存在的一种奇怪趋势m(B4sp8gCD_esnx=(j。研究人员对98只西伯利亚猛犸象的骨骼化石、牙齿和长牙进行了基因分析ouB;T(P7^QXyh。他们发现这些猛玛象中70%都是雄性%Vkh4B=z8ldc.|o
“我们认为这种情况基本上是由两种不同原因造成的WqimJ~BXJI。”洛夫·达伦是一位古生物学家,同时也是位于斯德哥尔摩的瑞典自然历史博物馆的教授G|84T9_J|RM8,FK。“一般来说,在野生动物中,雄性往往更爱冒险wB;2UYpjVZp@r。”
其二,如果现代大象文化有所指示的话,那就是雄性猛玛象一直是独居SkK_;ecRPGcV7c(Z,w7。与雌性猛玛象相比,雄性猛玛象更容易掉入薄冰和落水洞中,或是被困在泥石流中!zeYpImu+8!YK7rdJr5v。这些死亡方式使猛玛象的尸体更易保存,所以我们才能发现这些遗骸;Fn_xC)KBpy6Q。这项研究结果发表在《当代生物学》期刊上ajO^klGZ0naI^!
达伦说有个重要的提醒:化石记录还远未完成ekv5_1D-*;。“我们发现的化石可能并不总能代表物种存活时的情况#vc,H=w-jm@A3。”但是再进行一些发掘工作,即使看起来随意分布的遗骸也有很多秘密可以揭开bX(5H|C_j7cv2MKXd
谢谢大家收听科学美国人——60秒科学3~74!650z~]。我是克里斯托弗·因塔利亚塔uG;Y1[C^!suN;a2A-ANX

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译文为可可英语翻译,未经授权请勿转载!

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重点讲解

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重点讲解:
1. in general 总的来说;总体上来看;大体上;
例句:I disagree with drug laws in general.
总的来说,我反对药品法4Pf%UOAJH2
2. tend to do sth. 往往会;经常就;
例句:They tend to buy cheap processed foods like canned chicken and macaroni.
他们往往会买便宜的加工食品,像鸡肉罐头和通心粉之类的53~6NjrG@hW5CDgSA3
3. be likely to do sth. 可能(做…)的;有(…)倾向的;
例句:She is likely to give you a flat refusal.
她很可能会断然拒绝你(.,#~)sTBf3a9vJ
3. be far from 根本不;远远不;
例句:It was obvious that much of what they recorded was far from the truth.
显然,他们所记录的很多根本不是事实t|ztL8]qy_|ploe2a

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重点单词
  • revealvt. 显示,透露 n. (外墙与门或窗之间的)窗侧,门
  • geneticallyadv. 遗传(基因)方面
  • detectiveadj. 侦探的 n. 侦探
  • trendn. 趋势,倾向,方位 vi. 倾向,转向
  • occupationn. 职业,侵占,居住
  • randomadj. 随机的,随意的,任意的 adv. 随机地 n.
  • remindern. 提醒物,提示
  • planetn. 行星
  • obviousadj. 明显的,显然的
  • disagreev. 不一致,有分歧,不适应,不适宜