那次大灭绝是由闯入地球的一颗巨型小行星造成的，形成了墨西哥希克苏鲁伯陨石坑。

Thee extinction was caused by a massive asteroid slamming into Earth at Chicxulub in Mexico.

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大卫•赫尔方：那种能带来全球影响的，类似于6400万年前造成恐龙灭绝的巨型小行星实际上很少。

David Helfand: the very big ones, the ones that have global consequences, such as the one 64 million years ago that killed the dinosaurs, are very rare.

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你可以在小行星带找到巨型钻石。

You can find large diamonds in the asteroid belt.

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