英语听力：探索发现 2014-07-06 BBC 地平线：陨石的真相-24
时间：2014-08-26 09:15:52
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（单词翻译）
The meteorite1 was 15 kilometres across, enough to cause utter devastation2 across the whole planet. It exploded with a force of 100 million million tones of TNT. The blast sent a giant plume3 of vaporized rock out into space. A crater4 was punched 30 kilometres into the Earth’s crust. It was above this rim5 of weakened rock that these cenotes formed millions of years later. The blast would have been ferocious6. But it was what happened next that made the impact a global catastrophe7.
The blast plume that shot into space fell back to Earth. Billions of molten particles superheated the air to a temperature of hundreds of degrees. Fires swept the planet, choking the atmosphere with
soot8 and dust. The
dinosaurs9, and most other creatures, were
doomed10.
That discovery, back in the 1980s, about what happened at Chicxulub, changed everything. Up until then, we thought that the Earth had changed only through grindingly slow processes, but now we knew that there was also sudden, violent
catastrophes11 that made the Earth the way it was. Of course, what that meant was that something like this could happen again, at any moment.
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