And these animals disappeared, and a separate life, mammals, radiated out to take their place. And so, we know this in extraordinary detail. And so this is a core from near Bermuda. We know that the tsunamis, the earthquakes, and the things that we've experienced in the entire record of humankind history can't really quite get around the kind of disaster that this represented for the Earth.
然而这些动物突然都消失了， 另一种新的生命形式，哺乳动物 逐渐繁荣起来，并取代了它们。我们对这一点 非常了解。因此，这是揭开谜团的重要线索。 我们知道像海啸、地震 和我们整个人类历史上 所经历的其他一切灾难 在我们居住的地球上 都是不可避免的。