【万物简史】PART IV CH 13砰！（5）_英语听力练习mp3下载-科学-沪江听力酷

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【万物简史】PART IV CH 13砰！（5）

听力简介：

苏美尔去陨石坑考察前，人们普遍认为这个大坑是地下蒸汽爆发形成的。直到苏美尔大学期间的一次考察，才让他对这种想法产生了异议，并由此利用业余时间的考察，开始了对这一天外威胁的探索。

❤《万物简史》推出部落节目版，戳这里订阅http://bulo.yeshj.com/menu/6004/

文中需听写单词或词组用[-No-]表示，句子用[---No---]表示。请边听写边理解文意，这样可以提高听力准确度，并为训练听译打下基础哦~~~

Hint:

Barringer

By the time Shoemaker came along, a common view was that Meteor Crater had been formed by an underground steam explosion. Shoemaker knew nothing about underground steam explosions—he couldn’t: they don’t exist—but he did know all about blast zones. One of his first jobs out of college was to study explosion rings at the Yucca Flats nuclear test site in Nevada. [---1---]—anomalous fine silicas and magnetites principally—that suggested an impact from space. Intrigued, he began to study the subject in his spare time.

Working first with his colleague Eleanor Helin and later with his wife, Carolyn, and associate David Levy, Shoemaker began a [-2-] survey of the inner solar system. They spent one week each month at the Palomar Observatory in California looking for objects, asteroids primarily, whose trajectories carried them across Earth’s orbit.

“At the time we started, [---3---],” Shoemaker recalled some years later in a television interview. “Astronomers in the 20th century [-4-] abandoned the solar system,” he added. “Their attention was turned to the stars, the galaxies.”

What Shoemaker and his colleagues found was that there was more risk out there—[-5-]—than anyone had ever imagined.