英语听力：探索发现 2013-01-13 冰河新新州 Ice Age Oasis—14

 Some of this ice age dung was found beneath the skull¹ in the Aucilla. The dung contained plant remains² that tell us what the mastodon was browsing³ on 13,000 years ago or more—a mixture of trees and grasses.

 

This suggests that ice age Florida was drier than it is today—a mix of woodlands and savanna⁴ rather than swamps. And mastodon teeth found in the Aucilla held a more important revelation. The enamel⁵ contains chemical signatures of a local soil, passed by the plants the mastodons ate. But some of the chemicals found in the Aucilla teeth could only have come from soil hundreds of miles further north. The inescapable conclusion is that these mastodons migrated, making a round trip of more than 400 miles every year. And since their dung also contains remains of summer fruits from the Aucilla region, they must have travelled north for the winter. 

 

The question is, why? Why leave a place which as we have seen was abundant with food and a refuge from the cold? And why go north for the winter when most migrants move south? Perhaps the present climate can provide a clue. 

 

Florida has a peculiar⁶ seasonal⁷ quirk⁸. Although the winter months are cooler, they are also drier, much drier. Between October and February, there's almost no rainfall at all.

1 skull   

n.头骨；颅骨

参考例句：

• The skull bones fuse between the ages of fifteen and twenty-five.头骨在15至25岁之间长合。
• He fell out of the window and cracked his skull.他从窗子摔了出去，跌裂了颅骨。

2 remains   

n.剩余物，残留物；遗体，遗迹

参考例句：

• He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
• The remains of the meal were fed to the dog.残羹剩饭喂狗了。

3 browsing   

v.吃草( browse的现在分词 )；随意翻阅；（在商店里）随便看看；（在计算机上）浏览信息

参考例句：

• He sits browsing over[through] a book. 他坐着翻阅书籍。 来自《简明英汉词典》
• Cattle is browsing in the field. 牛正在田里吃草。 来自《简明英汉词典》

4 savanna   

n.大草原

参考例句：

• The savanna is also the home of meat-eaters--the lion,leopard,and hyena who feed on the grasseaters.大草原也是食肉动物的家乡--狮子、豹、鬣狗--它们都是以草食动物维持生命的。
• They sped upon velvet wheels across an exhilarant savanna.他们的马车轻捷地穿过一片令人赏心悦目的大草原。

5 enamel   

n.珐琅，搪瓷，瓷釉；(牙齿的)珐琅质

参考例句：

• I chipped the enamel on my front tooth when I fell over.我跌倒时门牙的珐琅质碰碎了。
• He collected coloured enamel bowls from Yugoslavia.他藏有来自南斯拉夫的彩色搪瓷碗。

6 peculiar   

adj.古怪的，异常的；特殊的，特有的

参考例句：

• He walks in a peculiar fashion.他走路的样子很奇特。
• He looked at me with a very peculiar expression.他用一种很奇怪的表情看着我。

7 seasonal   

adj.季节的，季节性的

参考例句：

• The town relies on the seasonal tourist industry for jobs.这个城镇依靠季节性旅游业提供就业机会。
• The hors d'oeuvre is seasonal vegetables.餐前小吃是应时蔬菜。

8 quirk   

n.奇事，巧合；古怪的举动

参考例句：

• He had a strange quirk of addressing his wife as Mrs Smith.他很怪，把自己的妻子称作史密斯夫人。
• The most annoying quirk of his is wearing a cap all the time.他最令人感到厌恶的怪癖就是无论何时都戴著帽子。