The prehistoric world of the Cretaceous Period.

这里是白垩纪时期的史前世界。

The prehistoric world is no exception.

史前世界也不例外。

A find that would change what we thought we knew about the Arctic prehistoric world.

这一发现会颠覆我们对北极地区史前世界的认知。

It's a creature that proves that, in this prehistoric world, death can come in any size.

这一生物证明，在史前世界之中任何大小的生物都能致命。

The T. Rex is highly intelligent. Its cerebrum is one of the largest of the prehistoric world.

雷克斯霸王龙的智力水平很高。它的大脑大小在史前世界里名列前茅。

The size of its brain cavity shows that this dinosaur was not the most intelligent in the prehistoric world.

角鼻龙的颅腔大小表明它在史前世界不是最聪明。

But this discovery would reveal the first clear evidence of dinosaur cannibalism ever found in the prehistoric world.

不过这个发现揭示了有史以来第一个史前世界里恐龙同类相食的清晰证据。

But the prehistoric world was also home to a wide variety of other quite different species.

但是史前世界也是许多其他完全不同的物种的家园。

Dinosaur expert Robert Gaston was on a routine search for fossils when he happened upon a discovery that would rock the prehistoric world.

恐龙专家罗伯特·加斯顿偶然做出的一个发现将震撼史前世界时，他正在进行例行的化石搜寻。

By extracting oxygen, and carbon isotopes from the sediment and analyzing their chemical make-up, geochemists can deduce temperature, humidity, and even weather conditions from prehistoric world.

通过在沉积层里提取氧和碳的同位素，并且分析其化学构成，地化学家能够推测出温度、湿度、甚至是史前世界的气候条件。