Giant ground sloths were 500 times bigger than their modern relatives.

巨型地懒的体型比他们的现代亲戚大500倍。

Others, however, such as giant ground sloths, giant hyenas, and mammoths went extinct.

但是其余的动物，如巨型地懒、巨鬣狗、和猛犸象则灭绝了。

Although the giant ground sloth is now extinct, like the opossum, it has family ties in South America.

尽管巨型地懒已经灭绝，但是像负鼠一样，南美也能找到它的“家庭成员”。

The die-off in South America included giant ground sloths and armadillo-like animals the size of cars known as glyptodonts.

南美洲灭亡的动物包括大型地懒和一种犰狳科动物，足足有汽车大小的雕齿兽。

It's the claw from a giant ground sloth and it really was a giant—6 metres long and weighing up to 4 tons.

巨型地懒，这种地懒巨大无比，身长6米，体重40多吨。

Once among the largest animals in South America, giant ground sloths were three to four meters long and usually walked on all four legs.

巨型地栖树懒曾经是南美洲最大的动物之一，有三到四米长，通常用四条腿走路。

I'm talking about Tanque Loma, where at least 22 giant ground sloths in the genus Eremotherium met their end.

我说的是 Tanque Loma，那里至少有 22 只 Eremotherium 属的巨型地懒死亡。

So giant ground sloths enjoying a dip from time to time wouldn't be that strange, from an evolutionary perspective.

因此，从进化的角度来看，巨型地面树懒时不时地享受一下并不奇怪。

From the 90-foot apatosaurus to the giant ground sloth, a diverse range of creatures have prospered, and perished, on our planet.

从 90 英尺长的雷龙到巨大的地懒，各种各样的生物在我们的星球上繁衍生息过，也曾灭亡过。

And it is full of bones - literally thousands of them, most of which belong to that one species of giant ground sloth.

它里面装满了骨头——字面上有数千块，其中大部分属于那种巨型地懒。

Meanwhile, in South America, there were marsupials, giant ground sloths, and huge cousins of the armadillo called glyptodons that moved north.

与此同时， 在南美洲，有袋类动物、巨型地懒和犰狳的巨大表亲雕齿兽向北迁移。

So if giant ground sloths were social and lived in groups, that expands our understanding of what it means to be a sloth!

因此， 如果巨型地懒是群居的并且群居，那将扩展我们对成为树懒意味着什么的理解！

And it's in this isolation that  unique animals originated -- like giant ground sloths and armored glyptodons, the enormous relatives of today's armadillos.

正是在这种与世隔绝的环境中， 独特的动物诞生了——比如巨型地懒和铠甲雕齿兽，它们是当今犰狳的巨大亲戚。

A leading British ethno-biologist, wrote the Economist in 1995, thinks a megatherium, a sort of giant ground sloth which may stand as high as a giraffe ... may lurk in the fastnesses of the Amazon basin.

“一位著名的英国民族生物学家认为，”《经济学家》杂志l995年写道，“有一种高如长颈鹿的大地懒，有可能出没在亚马孙河流域僻静的丛林里。”

These dinosaurs had the hips of a plant-eater, long arms that ended in long claws like a giant ground sloth, and four-toed feet like prosauropods.

这些恐龙有食草动物的臀部、长长的手臂和长长的爪子，就像巨大的地懒，还有像原蜥脚类动物一样的四趾脚。

Their hands began to have a greater range of motion, and their claws gradually became better-adapted as grasping hooks for foraging, similar to the claws of extinct giant ground sloths.

他们的手开始有更大的活动范围，他们的爪子逐渐变得更适合作为觅食的抓钩，类似于已灭绝的巨型地懒的爪子。

Now, giant ground sloths aren't hippos - obviously - but researchers think that it's totally plausible that they might've wallowed in pools, because lots of other big herbivores that live in hot, dry environments do this.

现在，巨型地懒显然不是河马，但研究人员认为它们可能在水池中打滚是完全合理的，因为生活在炎热干燥环境中的许多其他大型食草动物也会这样做。