translation.en: But we haven't witnessed a big asteroid impact, so this is a type of neo-catastrophism, and it took about 20 years for the scientific establishment to finally come to grips: yes, we were hit; and yes, the effects of that hit caused a major mass extinction.
translation.zh: 但我们还没亲眼见过巨大的小行星撞击， 所以这是新灾变的一种类型。 而科学的论据真正解决问题 大约要花20年时间：没错，我们被撞了； 没错，撞击导致了物种大灭绝。