This catastrophic period finished the trilobites off — along with approximately 96% of all marine species.

这段灾难性的时期让三叶虫完全消失，所有海洋物种中有近 96% 也难逃此劫。

But trilobites left a remarkable record behind.

但三叶虫留下了非凡的记录。

Trilobite diversity dwindled, and come about 360 million years ago, only one of the 10 former trilobite orders remained.

三叶虫的多样性减少，到了三亿六千万年前，过去所有的三叶虫目中，只有十目存活下来。

Was it the " Please don't show me another picture of a trilobite" vibe?

是“别再给我看三叶虫照片” 的电吗？

This was the beginning of what would prove to be the trilobite's long demise.

后来证实，这就是三叶虫漫长灭绝之路的开端。

Trilobites have no direct descendants, but their evolutionary cousins are alive and well.

三叶虫没有直系的后代，但它们在演化上的表亲现在仍然活得很好。

With so much time at their disposal, the trilobites proliferated prodigiously.

三叶虫有那么漫长的支配时间，因此数量激剧增加。

Shelly creatures such as trilobites and brachiopods, of whose ancestors there is little sign in the rocks, are suddenly everywhere.

像三叶虫、腕足动物此般壳类动物的祖先没有在岩层中留下什么痕迹，但它们的遗迹却突然间比比皆是。

It's Earth about 500 million years ago, when these creatures, called trilobites, prospered.

这是大约五亿年前的地球，这种生物叫做三叶虫，当时地球是它们的天下。

From about five hundred million years ago, big creatures became much more common, from trilobites to trees to tyrannosaurus rex.

从大约五亿年前开始，大型生物变得更加常见，从三叶虫到树木再到雷克斯霸王龙。