Other residents of Eocene Antarctica probably came from South America as well.

始新世极洲的其他居民可能 也来自美洲。

Let's rewind back to the Eocene, about 45 million years ago.

让我们回大约 4500 万年前的始新世。

So given its size, it was able to support many different ecosystems in the Eocene.

所以考虑它的大小，它能够支持 始新世许多不同的生态系统。

For example, Juxia from the Late Eocene epoch of China was about the size of a horse.

例如，中国始新世晚期的巨霞大约有马那么大。

And they arrived in South America by the middle Eocene Epoch, around 42 million years ago.

他们在大约 4200 万年前的始新世中期美洲。

Antarctica in the Late Eocene, was home to at least two more species of giant penguin.

始新世晚期的极洲是少两种巨型企鹅的家园。

Though the Cretaceous asteroid cleared the stage, mammals did not really get going until 10m years later, in the Eocene epoch.

尽管时期的小行星灭绝了居统治地位的恐龙，但哺乳动物却一直1000万年后的始新世才真正兴起繁盛起来。

Or there's the Eocene, more than 34 million years ago, a hothouse time during which the continents drifted into their present configuration.

或者是超过 3400 万年前的始新世，这是一个温室时代，在此期间大陆逐渐变成了现在的形态。

One of these earliest rhino-ancestors was Hyrachyus, a lightly built herbivore from the Eocene epoch that looked kind of like a tapir.

Hyrachyus 是这些最早的犀牛祖先之一，它是一种来自始新世的轻型食草动物， 看起来有点像貘。

From their early, possibly-tree-climbing origins in the Late Eocene or Early Oligocene, they diversified and expanded with the spread of grasslands in the Miocene, taking advantage of new predatory niches.

从它们起源于晚始新世或早渐新世的早期（可能是爬树）开始，它们随着中新世草原的扩张而多样化和扩张，利用新的掠食性生态位。

Were the beautiful volute and cone shells of the Eocene epoch, and the gracefully sculptured ammonites of the Secondary period, created that man might ages afterwards admire them in his cabinet?

始新世美丽的蜗壳和锥壳， 以及第二时期雕刻精美的菊石， 是为了让人们在以后的岁月里在他的橱柜里欣赏它们而创造的吗？

Filling  ecological niches once occupied by dinosaurs, mammals came to dominate the dry grasslands and  forests of the Eocene and beyond, but no species may have been more threatening than humankind.

哺乳动物填补了曾经被恐龙占据的生态位，并开始主宰始新世及以后的干燥草原和森林，但没有任何物种比人类更具威胁性。

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.

早在始新世初期，世界就处于古新世-始新世极热期的控制之下，温暖潮湿的森林覆盖了北两极的土地。

By the start of the Eocene Epoch about 56 million years ago, North America was also home to omomyiforms, a group of tarsier-like primates, and adapiforms, which were more lemur-like.

大约 5600 万年前的始新世开始时，北美也是 omomyiforms（一群像眼镜猴的灵长类动物）和 adapiforms（更像狐猴）的家园。

As they report in Nature, the critter, which lived around 55m years ago, in the Eocene epoch, seems to be the most primitive relative of tarsiers, mouse-sized primates which now inhabit the islands of South-East Asia.

这种生活在大约五千五百万年前始新世时期的动物似乎是眼镜猴（这种灵长类动物有老鼠一样的体型，现在居住在东亚的岛屿上）最原始的亲戚。

This transition from the Eocene to the Oligocene caused the extinction of 60% of terrestrial mammals around the world, but by the middle Oligocene a new biome emerged that really worked for mustelids - grasslands.

从始新世渐新世的这种转变导致世界上 60% 的陆生哺乳动物灭绝，但了渐新世中期， 出现了一种真正适合鼬科动物的新生物群落——草原。