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And after killing the dinosaurs, and I'm going to say here too, that there's been some discrepancy over the years, particularly now since new research is coming in, that although it killed the dinosaurs often, it might not have been the ultimate cause. The dinosaurs were maybe at that point on their way out. This was sort of the nail in the coffin for them. But after killing the dinosaurs, it caused a number of other events. These were destructive, including acid rain, a global firestorm, and a cloud of dust that surrounded the Earth and cooled the planet. And the length of this, which you might call a nuclear winter, it's unknown. About 75% of all species might stink at this point.