Fossil footprints bring animals back to life, then.

化足迹使得动“复活“。

They are bigger than any other fossil cats.

要比其它化猫动都大。

He is a fossil marine mammals expert at the Smithsonian National Museum of Natural History.

他是史密森国家自然历史博馆的海洋哺乳动化专家。

Scientists have unearthed the fossil of a mammal which lived 125 million years ago.

家出土了活在1.25亿年前一只哺乳动的化。

On a global scale, medium-sized carnivore fossils are slightly less common than small and large.

在全球范围内，中型食肉动化比小型和大型食肉动化略少。

The sedimentary rocks of the Badlands contain one of the world’s largest and most complete collection of mammal fossils.

荒地的沉积岩中含有世界上最大、最完整的哺乳动化。

Ichnofossils are any track or trail, left behind by an animal.

遗迹化是动留下的任何足迹或小径。

For decades, speculation reigned about where all these seemingly-different fossil animals fit in the family tree of dinosaurs.

几十年来，人们一直在猜测所有这些看似不同的化动在恐龙家谱中的位置。

A piece of history has been found thanks to a boy tripping on a rare, 1.2-million-year-old animal fossil.

一块拥有 120 万年历史的稀有动化将一个小男孩绊倒了，人类的一段历史由此被揭晓。

5% of the fossils of terrestrial vertebrates.

陆脊椎动化的 5%。

Douglas Erwin is with the Smithsonian Institution. He said he is sure the fossils are from an animal.

道格拉斯 欧文（Douglas Erwin）在史密森尼会工作。他表示自己很确定这种化来自于动。

In fact, their fossilized conga lines represent some of the first evidence of animal group behaviour.

事实上，他们的康茄线化代表了动群体行为的一些最初证据。

But scientists have uncovered fossil evidence of an animal that produces sperm ten times longer than its body.

但是家们发现了一种动的化证据，这种动产的精子比它的身体长十倍。

NARRATOR: Anatomists Farish Jenkins and Steve Gatesy are specialists in the function of limbs and joints in fossil animals.

旁白：解剖家法里什·詹金斯和史蒂夫·盖茨是化动四肢和关节功能方面的专家。

And a lot of what we know about this phenomenon, we know from the fossils of mammals.

我们从哺乳动化中了解到的很多关于这种现象的知识。

Thousands of brachiopod fossils at the site had been clustered in sediment once covered by the sea.

该遗址的数千块腕足动化曾聚集在曾经被海水覆盖的沉积中。

That means big animals can be overrepresented at fossil sites.

这意味着大型动在化遗址中的数量可能过多。

Druckenmiller: We don't actually find fossils of cold-blooded land-living animals alongside our dinosaurs.

德鲁肯米勒：我们实际上并没有在恐龙旁边找到冷血陆动的化。

However, an analysis of the fossil also revealed some features which resemble those of anthropoids like monkeys and apes, including man.

然而，分析化发现这种动的一些特征和类人猿（如猴子、猩猩，包括人类）相似。

But then some researchers discovered that the fossil showed the many limbs of an animal and began to study it further.

但后来一些研究人员发现，这块化显示了动的许多腕足，并开始对其进行进一步研究。