Research scientists have shown the meteorite hit the earth about 30 million years earlier than the mass extinction of dinosaurs.

科学家们的研究表明，这颗陨石撞上地球的时间要比恐龙大规模灭绝的时间早大约30万年。

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While there are a dozen or more mass extinctions in the geological record, the Cretaceous mass extinction has always intrigued paleontologists because it marks the end of the age of the dinosaurs.

虽然在地质记录中有十几次甚至更多的大灭绝，但白垩纪的大灭绝总是引起古生物学家的兴趣，因为它标志着恐龙时代的结束。

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Presumably, those environmental disasters could have been responsible for the mass extinction, including the death of the dinosaurs.

据推测，这些环境灾难可能是物种大规模灭绝的成因，包括恐龙的灭绝。

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In truth, agreement on the cause of the mass extinction at the end of the Cretaceous (when not only the dinosaurs, but also a host of other species died) has never been as cut and dried among palaeontologists as it may have appeared to the public.

ECONOMIST: Mass extinctions