Strong evidence that the dinosaurs were killed off 66 million years ago by an asteroid hitting Earth has been found in the Chicxulub crater under the Gulf of Mexico.

中文翻译：

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陨石坑中的铱证实小行星消灭了恐龙

在墨西哥湾下的希克苏鲁伯陨石坑中发现了强有力的证据，表明恐龙在 6600 万年前被小行星撞击地球杀死。