First, he explains why antelope and pronghorns look very similar.

首先，他解释了为什么羚羊和叉角羚看起来非常相似。

The pronghorn lived alongside other grazers still around today, including bison.

叉角羚曾经与像今日仍旧存活的野牛那样的其他食草动物共伴而生。

So why do pronghorn feel this need for speed?

为什么叉角羚需要这样的速度呢？

The species at risk include bighorn sheep, gray wolves, pronghorn antelope and jaguars.

濒危物种包括大角羊、灰狼、叉角羚和美洲虎。

Pronghorn antelopes are unique to North America and among the toughest creatures on the plains.

叉角羚是北美独一无二的一种羚羊，也是平原上的最顽强的物种。

Ever hear of the pronghorn antelope in the American West?

听说过美国西部的叉角羚吗？

And pronghorn would have needed all their amazing speed.

叉角羚以其令人惊叹的速度著称。

Archaeological evidence indicates that pronghorn have been moving through Trapper's Point for at least 6,000 years.

考古证据表明，至少6000年来，叉角羚一直在穿越“诱捕点”。

No current predator can outrun a healthy adult  pronghorn.

目前没有任何捕食者能跑得过健康的成年叉角羚。

This was a perfect setting, because we had been studying these pronghorn, these animals on their long-distance migration, for about a decade.

这是绝佳的观察地点，因为我们研究叉角羚长途迁徙已经有近10年时间了。”

These pronghorn antelopes among the great survivors of the ice age reveal a lot about the distant past.

这些叉角羚也是雄奇的冰河期生还者之一，揭示着许多远古的记忆。

Twice a year, between one (thousand) and two thousand pronghorn, along with some 3,000 mule deer pass through the area.

1000至2000只叉角羚以及大约3000只长耳鹿会穿过这一地区，每年两次。

Pronghorn moms are neat freaks and keep their  babies dry and clean.

叉角羚妈妈是爱整洁的怪人，她们会保持宝宝的干爽和清洁。

Despite their aggressive behavior, pronghorns  are high-key herbivores who love to graze.

尽管有攻击性行为，叉角羚还是喜欢吃草的高调食草动物。

But, if you lo ok in the fossil record, during the Pleistocene, pronghorn may well have needed that speed.

但是，如果你仔细观察化石记录，就会发现在更新世期间， 叉角羚很可能需要这样的速度。

Male pronghorns will strike with their hooves  or use their horns against predators and other pronghorns alike, when battling for  dominance.

在争夺统治地位时，雄性叉角羚会用蹄子攻击或用角对抗捕食者和其他叉角羚。

From curly horns to pronghorns, branching antlers to knobby ossicones, all these mammals have elaborate bones growing out of their heads.

从卷角角到叉角羚，从分叉的鹿角到多节的骨锥，所有这些哺乳动物的头部都长出了精致的骨头。

This sends a message to other  pronghorns warning them of danger.

这会向其他叉角羚发送一条消息，警告它们有危险。

The pronghorn is one animal that really  shows how much our past shapes our future.

叉角羚是一种真正展示了我们的过去在多大程度上塑造了我们的未来的动物。

And in the western U.S. state of Wyoming, crossing points and fencing built for a migration of North American pronghorns helped reduce animal-driver crashes by 85 percent.

而在美国西部的怀俄明州，为北美洲糜鹿迁徙所建造的通道和围栏也助力让人与动物的装机率降低了85%。