英语听力精选进阶版 7211(在线收听

Background: 在中国发现的一块小型恐龙化石标本改变了多年来科学家们对鸟类起源研究的理论。一个半世纪以来,研究人员一直认为始祖鸟是最原始、最古老的鸟类,但最新发现的标本有可能改变这一看法。

Archaeopteryx has a hallowed place in science, long hailed as not just the first bird but as one of the clearest examples of evolution in action. But in recent years, doubts have arisen as older fossils with similar bird-like features such as feathers and wishbones were discovered.

Now Chinese researchers believe they have finally knocked Archaeopteryx off its perch. They've discovered another similar species named Xiaotingia which dates back 155 million years to the Jurassic era.

By carefully analysing and comparing the bony bumps and grooves of this new chicken sized fossil with Archaeopteryx, scientists now believe that both are in fact feathery dinosaurs and not birds at all.

Professor Lawrence Witmer from Ohio University, who has written a commentary on the finding, says the discovery will have huge implications for our understanding of the origins of birds. Such are the similarities between these transition species of reptiles and birds that scientists involved with this latest finding say that it certainly won't be the end of the argument. Further discoveries may change and even restore Archaeopteryx to its former glory.

Glossary 词汇表

a hallowed place 很重要的地位 

to be long hailed as 长期被确认为 

a fossil 化石 

a wishbone (鸟禽胸部的)叉骨 

a perch (鸟类的)栖息处 

the Jurassic era 侏罗纪时代的 

feathery 有羽毛的 

the finding 一项发现、研究成果 

the implications for 对… 有影响 

a transition species 一个处于过渡期的种类

Questions:

1. Researchers from which country have made these discoveries? 

China.

2. How old is the new fossil? 

About 155 million years.

3. What do scientists think this bird-like fossil actually is? 

A feathery dinosaur.

4. True or false? Scientists are certain now about Archaeopteryx being less important. 

False. According to the report, further discoveries may change and even restore Archaeopteryx to its former glory.

  原文地址:http://www.tingroom.com/lesson/yytljxjjb/457990.html