【Earth&Sky】火山爆发杀死了恐龙吗？_英语听力练习mp3下载-科学-沪江听力酷

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【Earth&Sky】火山爆发杀死了恐龙吗？

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听写填空,只写填空内容,不抄全文,4个单词/词组+1个句子,不用写标号~

Since 1980, scientists have believed a meteorite impact in the Yucatan caused a mass extinction of species, including the dinosaurs. But [-----1-----] Gerta Keller of Princeton disagrees.

Gerta Keller: This impact actually didn’t cause any species [-----2-----].

According to 20 years of research by Keller and her team, this impact happened 300,000 years after the dinosaurs disappeared. Keller believes that — instead of a space rock — volcanoes might have killed the dinosaurs.

Gerta Keller: Now we find that the other [-----3-----], which is Deccan Volcanism, may be the real culprit.

She's talking about volcanic eruptions on India's Deccan plateau between 63 and 67 million years ago. The volcanoes spewed huge amounts of sulfur dioxide into the air. With each [-----4-----] volcanic flow, Keller said, less evidence of life appears within the cores.

Gerta Keller: [-----5-----]

That's today's show, celebrating The International Year of Planet Earth.

Thanks to the National Science Foundation and US Geological Survey.

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