Cenozoic. You probably won't get on that, but I'll leave it to make the story more fun.

新生代。你可能不会遇到，但我会利用它让故事更有趣。

I'm going to delete " cretaceous, " I'm going to delete " Cenozoic" and I'm going to delete " iridium."

我要删除“白垩纪”、“新生代”、“铱”。

The meteorite killed off the dinosaurs and started the Cenozoic Era, or what is known as the age of mammals.

那颗陨石杀死了恐龙，开启了新生代，也就是众所周知的哺乳动物时代。

But, now you’ve arrived at the Cenozoic Era.

但是，现在你已经到了 新生代。

As for the hell ants, well they were gone about 10 million years before the Cenozoic even started.

至于地狱蚂蚁，它们在新生代开始前大约 1000 万年就消失了。

Well, there's a 20-million-year gap in the fossil record between the last Cretaceous ant and the earliest Cenozoic ant fossils.

好吧，在最后的白垩纪蚂蚁和最早的新生代蚂蚁化石之间的化石记录中有 2000 万年的差距。

But the fossil record of Madagascar stops abruptly at the beginning of the Cenozoic Era, about 66 million years ago.

但是马达加斯加的化石记录在大约 6600 万年前的新生代初期突然停止了。

The next one happened about 100 million years later during the Cenozoic era, after the extinction of the dinosaurs and the rise of mammals.

下一次发生在大约1亿年后的新生代，当时恐龙灭绝和哺乳动物崛起。

Alright... so now we know about our mammal relatives from the Mesozoic, but what happened after during the Cenozoic?

好吧… … 所以现在我们了解了中生代的哺乳动物亲属，但是新生代之后发生了什么？

They met during a conference on the Cenozoic area, where they presented their research on the impact of meteorites on the extinction of cold-blooded organisms.

他们在一次关于新生代地区的会议上相遇，在那里他们展示了陨石对冷血动物灭绝影响的研究。

Free of competition from the tree-dwelling opposite birds, a lot of neoavians quickly took to life in trees at the dawn of the Cenozoic.

由于没有与栖息在树上的鸟类竞争， 新生代初期，许多新鸟类迅速在树上生活。

But, as the Cenozoic Era started, a completely different group of sea turtles was ready to take over the world's oceans -- the true leatherbacks.

但是，随着新生代的开始，一群完全不同的海龟准备接管世界海洋——真正的棱皮龟。

For example, let's assume the nonavian dinosaurs had the same ratio of big species to small ones as the extinct land mammals of the Cenozoic era did.

例如，我们假设非鸟类恐龙的大型物种与小型物种的比例与新生代灭绝的陆生哺乳动物相同。