Tommotian and Burgess Shale formations give clues about Precambrian evolution.

早间，Tommotian和伯吉斯页岩化石群为前寒武纪进化提供了线索。

Now go back to the Cretaceous Period and look at our tiny, fuzzball ancestors.

人类眼光不足以让我们看出它有多么特别再回到寒武纪时期。

During the Cambrian Period, many major animal groups first appeared on Earth.

寒武纪时期，地球上首次出现许多生物群。

The earliest fossils that scientists are relatively sure are animals come from around 550 million years ago, just before the Cambrian explosion.

科学家相对确定为最早动物化石来自于5.5亿年前，恰好在寒武纪爆之前。

I joked in one of my books that I felt as if I ought to put a safety helmet on before writing about the Cambrian period, but it did actually feel a bit like that.

我在一本书里开玩笑说，我觉得在写到寒武纪事之前应当先戴个安全帽，不我就是有点儿这样感觉。”

This then enabled the rise of carnivores, which in turn spurred a productive arms race, resulting in what's known as the Cambrian explosion.

这就促成了食肉动物出现，它们激起了一场繁殖力竞赛，最后演变为我们所知寒武纪爆。

This arms race helped drive the Cambrian Explosion, the explosion of new species around 500 million years ago, sometimes described as evolution's 'big bang moment'.

这种军备竞赛推动了寒武纪爆， 5 亿年前新物种爆，有时被描述为进化“爆炸时刻”。

In northern Australia, there hasn't been any new mounted buildings since the pre-Cambrian era that ended one and a half billion years ago.

在澳利亚北部，自 15 亿年前前寒武纪时代结束后，就再也没有出现新建筑。

Seaweeds, jellyfish-like creatures, sponges and the odd worm do start to put in an appearance a few million years before the Cambrian begins.

海藻、类似水母生物、海绵生物和奇怪虫子确实在寒武纪开始前几百万年已经出现。

It's as if, at one instant in this time we call the Cambrian Era, complex multi-cellular life suddenly emerged almost intact on the planet.

在寒武纪一段很短时间里，各种复杂多细胞生物突然横空出世。

Well, we have the Machinchang Cambrian Geoforest Park, the Killam Karst Geoforest Park, and the Dayang Bunting Marble Geoforest Park.

那么这三个公园是哪些呢？它们分别是马珍昌寒武纪地质森林公园、基廉喀斯特地质森林公园和达扬本丁理石地质森林公园。很好。

But basically, you know, the 90s and internet feels like a pre-Cambrian era when there were only sponges.

但基本上，你知道，90年代和互联网给人感觉就像前寒武纪时代，那时只有海绵宝宝。

But some might be the ancestors of the Cambrian megafauna.

但是他们中一些可能就是寒武纪型动物祖先。

In fact, says Fortey, there are relatively few Cambrian designs that are wholly novel.

实际上，福泰说：“寒武纪造型只有几种是完全新。

Scientists call the period between about 541 million to 530 million years ago, the Cambrian explosion.

科学家将5。41亿到5。3亿年前这段时间称为寒武纪爆。

He told the Associated Press it is believed that " … modern animal groups like jellyfish appeared 540 million years ago in the Cambrian explosion."

他告诉美联社，据信“… … 诸如水母之类现代动物群体出现在5。4亿年前寒武纪爆期间。”

Because such a great amount of life appeared in such a short amount of time, scientists call this time period " Cambrian Explosion" .

由于如此多生命形式在如此短时间内出现，科学家们把这个时期称为" 寒武纪生命爆" 。

Shortly after the Cambrian explosion, mud slides rapidly buried thousands of marine animals under conditions that favored fossilization.

在寒武纪爆后不久，滑落泥土迅速掩埋了成千上万海洋动物，形成了极有利于化石形成环境。

Follow-up work by Dr Zhu, in nine other sections of the Doushantuo formation, suggests this surge started just after the final Precambrian glacial period about 560m years ago, and went on for 9m years.

后续工作由朱博士完成，有九个其他陡山沱构造说明这个激增仅仅是在最后一次前寒武纪冰川之后，5.6亿年前，并且持续了900万年。

There, 8,000 feet above sea level, he found a shale outcrop, about the length of a city block, containing an unrivaled array of fossils from soon after the moment when complex life burst forth in dazzling profusion-the famous Cambrian explosion.

在海拔2438米地方。他现了一个页岩露头，长度相当于城市一个街区，里面蕴藏着一批化石，远自复杂生命爆爱——即著名寒武纪爆——之后不久时候。