After the Cretaceous Period, the dinosaurs were gone.

白垩纪结束，恐龙也从此绝迹。

The prehistoric world of the Cretaceous Period.

这里是白垩纪时期的史前世界。

Well, Edmontosaurus was sort of the Wildebeest of the Cretaceous plains.

埃德蒙顿龙就好像是白垩纪平原上的牛羚。

Evidence that these lizard kings dominated the oceans in the Cretaceous period.

这种发现证明了这些蜥蜴王在白垩纪就统治了海洋。

By the end of the Cretaceous, we had some very advanced dinosaurs.

到了白垩纪末期，出现了一些非常先进的恐龙。

Now go back to the Cretaceous Period and look at our tiny, fuzzball ancestors.

人类的眼光不足以让我们看出它有多么特别再回到寒武纪时期。

But that didn't stop dinosaurs from nesting there during the Cretaceous period.

但这没阻挡恐龙在白垩纪时在此筑巢。

Quetzalcoatlus is unlike any other dinosaur in the Cretaceous.

风神翼龙不同于白垩纪时期的其他任何恐龙。

To find such living fossils from as far back as the Cretaceous is extraordinary.

能发现白垩纪的活化石是非同了不起的。

The earliest known bird, Archaeopteryx, lived during the Jurassic, the period before the Cretaceous.

人类所熟知的最古老鸟类始祖鸟生活在白垩纪时期之前的侏罗纪时期。

The oldest-known ant fossil dates back about 100 million years to the Cretaceous Period.

已知的最古老的蚂蚁化石可以追溯到大约1亿年前的白垩纪时期。

During the Cretaceous, dinosaurs evolved into the most physiologically advanced creatures in Earth's history.

在白垩纪时期，恐龙已进化成了地球上有史以来身体结构最先进的生物。

It lived about 72 million years ago during a period of time called the Cretaceous Period.

它生活在大约7200万年前的白垩纪时期。

Yeah, man, I'm just stuck in Romania it's the Cretaceous, I'm never going to leave.

是啊，伙计，我被困在罗马尼亚了现在是白垩纪，我永远不会离开。

That happened 66m years ago, at the end of the Cretaceous period.

这一切就发生在6600万年前的白垩纪末期。

It lived during the Cretaceous Period - the final time in the age of the dinosaurs.

它生活在白垩纪——恐龙时代的最后一个时期。

During the Cretaceous period, 140 million years ago, this dinosaur sported a neck of dangerous looking spines.

在一亿四千万年前的白垩纪，这种恐龙的脖子上长着看起来很危险的刺。

That takes a lot of calcium, a mineral in short supply in the plants of the Cretaceous.

需要消耗很多钙元素在白垩纪，这是一种稀缺的矿物质。

He said, " The diversity of theropod dinosaurs by the end of the Cretaceous is totally amazing."

“到白垩纪末，兽脚亚目恐龙的多样性令人惊叹。”

In the case of pelagornithids, this particular role would be filled by flying reptiles in the Cretaceous period.

白垩纪时期，飞行爬行动物会取代 pelagornithids 这一特殊角色。