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 mighty carnivores ruled a dangerous world of Cretaceous Period.

强大的食肉动物统治着白垩纪的凶险世界。

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

这很合理，因为这样的景观纪和白垩纪的野兽鼎盛时期很常见。

The prehistoric world of the Cretaceous Period.

这里是白垩纪时期的史前世界。

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

披羽翼龙能让白垩纪晚期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6600多万年前地球白垩纪时期的沿海湿地中。

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。

Specifically a Mamites Ammonite from the Cretaceous Age.

一只白垩纪的马密特斯菊石。

Predators of Cretaceous are gigantic by our standard.

我们看来白垩纪的食肉动物都是巨大的。

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。

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

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

这一切就发生6600万年前的白垩纪末期。

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

卡斯蒂略说，白垩纪时期，海龟的体型增大了。

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

我们马里兰发现的白垩纪早期化石保存砂岩和粘土岩中。

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

我们知白垩纪的末期这两种恐龙灭绝之时，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1亿年前的白垩纪时期。

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

这种来自白垩纪的凶猛掠食者是有史以来最神秘和最具争议的恐龙之一。

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

接下来的九千万年里，开始了一个叫做白垩纪的新时期。

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

白垩纪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。

Being confined on the island of Madagascar in the late Cretaceous was pretty tough.

白垩纪的末期，被限制马达加斯加岛上很艰难。