Researchers say they have made a major discovery straight out of the Mesozoic era.

研究人员说，他们有了一个直接来自中生代的重大发现。

The Mesozoic Era, spanning over 180 million years.

中生代，跨度超过 1.8 亿年。

Yes, but tell me a dinosaur chicken salad sandwich wouldn't hit the Mesozoic spot.

对啊，但别告诉我一个恐龙鸡沙拉三明治没有中生代的感觉。

The first one occurred around 150 million to 140 million years ago during the Mesozoic era.

第一次发生在大约1.5亿至1.4亿年前的中生代。

And I think for this activity, I'm going to delete " mesozoic" because I don't care.

我想对于这个活动，我要除“中生代”，因为我觉得它没。

This would have been especially important in the extreme climate of the early part of the Mesozoic Era.

这在中生代早期的极端气候条件下尤其重要。

One hypothesis that has gained popularity among paleontologists is the role of extraterrestrial impacts in shaping the Mesozoic area.

有一种假说在古生物学家中越来越受欢迎，那就是外星撞击在塑造中生代地区中所起的作。

Like, " mesozoic" is really technical, you're probably not going to get that on the test, so I will delete that.

比如，“中生代”是非常专业的词，你可能不会在试中遇到，所以我把它掉了。

That period is called the Mesozoic Era.

那个时期被称为中生代。

… now when they found the remains of the Mesozoic mastodon...

他们找到中生代乳齿象化石。

The stage was set for the first act of the Mesozoic, the Triassic Period.

舞台是为 中生代的第一幕，三叠纪。

As more fossils of Mesozoic birds were found, more clues started to present themselves.

随着更多中生代鸟类化石的发现， 更多线索开始出现。

Most of these are from the Mesozoic era, which is divided into three periods, Triassic, Jurassic, and Cretaceous.

这些大多来自中生代，该时期被划分为三个阶段：三叠纪、侏罗纪和白垩纪。

Meanwhile, the descendants of those little cynodonts persisted through the entire Mesozoic Era, hiding in the dinosaur's shadows.

与此同时， 那些小型犬齿兽的后代在整个中生代时期都存活了下来，在恐龙的阴影下隐藏着。

But for the giant reptiles of the Mesozoic, their dominance turned out to be their downfall.

但对于中生代的巨型爬行动物来说， 它们的统治地位原来是它们的垮台。

It lived in the era before the Mesozoic, in the Paleozoic.

它生活在中生代之前的时代， 在古生代。

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

好吧… … 现在我们知道了一些中生代的哺乳动物亲戚，那么在新生代发生了什么呢？

They lived on, thriving in the Mesozoic while keeping a low profile among the dinosaurs.

它们在中生代继续生存繁盛，但在恐龙中保持着低调。

These events ushered in the third act of the Mesozoic: The Cretaceous Period.

这些事件迎来了 中生代的第三幕：白垩纪。

The climate during the Mesozoic was much different than what we see today.

中生代的气候与我们今天看到的大不相同。