Humans weren't at risk of dying out during the PETM, because we didn't exist.

在–始极热事件时人类并没有濒临灭绝的危险，因为我们还不存在。

The preceding Palaeocene epoch was also brought to an end, the rocks suggest, by a sudden release of methane.

岩石层研究表明甲烷的突然释放导致了之前的时期结束。

The latest discovery, he said, helps show a clear connection between the two areas during the Paleocene period.

他说，最的发现有助于显示这两个地区在时期的明显联系。

So, by the middle of the Paleocene Epoch, animal life was on the rebound.

因此，到了中期， 动物生命开始反弹。

Sometime during the late Paleocene, Titanoboa  disappeared from the lowland tropics of northern Colombia.

在晚期的某个时候，泰坦巨蟒从哥伦比亚北部的低地热带地区消失了。

The Paleocene-Eocene Thermal Maximum, 55 million years ago, was so warm, crocodiles swam the waters of the Arctic Circle.

5500 万年前的-始极热期非常，至于鳄鱼在北极圈的水域中游来游去。

These animals flourished in the superheated  jungles of the mid to late Paleocene, but none more than the colossal serpent, Titanoboa.

这些动物在中后期的过热丛林中繁衍生息，但其中最重要的莫过于巨蛇泰坦巨蟒。

This period  of warming, known as the Paleocene-Eocene Thermal Maximum or PETM, was likely caused by  a combination of natural factors.

这一变时期被称为-始极热事件或PETM，可能是由多种自然因素造成的。

Had Titanoboa survived beyond the PETM, it would have faced more challenges in the millions of  years between then and now.

如果泰坦巨蟒能够在始来的时期幸存下来，那么从那时到现在的数百万年里， 它将会面临更多的挑战。

So I found this down by the Bow River here in Calgary, and this is part of some kind of sycamore plant from the Paleocene.

我在卡尔加里的弓河边发现了这个，这是某种梧桐植物的一部分。

During the Late Paleocene and early Eocene, the global average temperature rapidly increased  by about 5 degrees Celsius, an event known as the Paleocene-Eocene Thermal Maximum or PETM.

在晚期和始早期，全球平均气迅速上升约 5 摄氏度，这一事件被称为-始极热期 (PETM)。

Back at the start of the Eocene Epoch, the world was in the clutches of the Paleocene-Eocene Thermal Maximum, and warm, damp forests covered the land from pole to pole.

在始初期，地球正处于-始极热事件的控制下，潮湿的森林从北极到南极覆盖了整个陆地。

The Paleocene Eocene Thermal Maximum is one of the most radical climate events ever unearthed, and the mass extinction that followed it was triggered — at least in part — by an injection of greenhouse gases into the air.

-始极热事件是众多未被发掘的极端天气事件之一，后面发生大规模灭绝的原因至少有部分是因为室气体排放进了大气。

During the Paleocene Epoch, which began about 66  million years ago, the king of the primeval world was not Tyrannosaurus Rex or Spinosaurus but a  colossal snake lurking in the warmest, wettest corners of South America.

在大约 6600 万年前的，原始界的王者不是霸王龙或棘龙，而是潜伏在南美洲最、最潮湿的角落的一条巨蛇。