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

能发现白垩的活化石是非同了不起的。

The mighty carnivores ruled a dangerous world of Cretaceous Period.

强大的食肉动物统治着白垩的凶险世界。

That is fair enough. Such landscapes were common during the beasts' heydays, the Jurassic and Cretaceous periods.

合理，因为样的景观在侏罗和白垩的野兽鼎盛常见。

The prehistoric world of the Cretaceous Period.

里是白垩的史前世界。

Quetzalcoatlus would make all other animals in the Late Cretaceous stare.

披羽蛇翼能让白垩晚的其他动物汗毛倒立。

It lived in coastal wetlands more than 66 million years ago during Earth's Cretaceous Period.

它生活在6600多万年前地球白垩的沿海湿地中。

Quetzalcoatlus is unlike any other dinosaur in the Cretaceous.

风神翼不同于白垩的其他任何恐。

Specifically a Mamites Ammonite from the Cretaceous Age.

一只白垩的马密特斯菊石。

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

埃德蒙顿就好像是白垩平原上的牛羚。

Predators of Cretaceous are gigantic by our standard.

在我们看来白垩的食肉动物都是巨大的。

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，种恐的脖子上长着看起来危险的刺。

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

一切就发生在6600万年前的白垩末。

Instead of getting bigger, like many other theropods in the Cretaceous, these dinos shrunk.

些恐并没有像白垩的许多其他兽脚类动物那样变大，而是缩小了。

Castillo said during the Creataceous, marine turtles had increased body sizes.

卡斯蒂略说，在白垩，海龟的体型增大了。

The early Cretaceous fossils that we find in Maryland are preserved in sandstones and clay-stones.

我们在马里兰发现的白垩早化石保存在砂岩和粘土岩中。

We know at the end of the Cretaceous period when these two dinosaurs go extinct, something big occurs in the environment.

我们知道在白垩的末两种恐灭绝之，环境出现了巨大变化。

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。

This ferocious predator from the cretaceous is one of the most mysterious  and controversial dinosaurs to ever live.

种来自白垩的凶猛掠食者是有史以来最神秘和最具争议的恐之一。

Over the next 90 million years, a new era called the Cretaceous period dawned.

在接下来的九千万年里，开始了一个叫做白垩的新。

Herbivores of the Cretaceous are built to take on the biggest teeth and sharpest claws nature has ever produced.

白垩的食草动物天生就能承受自然界最大尖牙和最强利爪的猛烈攻击。