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At one of the worst scenes of slaughter ever unearthed, a top predator, a panicked stampede, and a natural disaster converge.
这是出土的最惨烈的大屠杀之一，一种顶级掠食者，一次恐慌奔逃，加上一次自然灾难的聚集。
Step by step, science expands the evidence to unravel the Arctic dinosaur mystery.
科学抽丝剥茧般地拓展证据揭开北极恐龙之迷。
They were the Earth's largest animals.
它们曾是地球上最大的动物。
New technology and forensic evidence helps paleontologists bring to life some of their final moments.
新的科技和现场证据如今帮助古生物学家们重现了它们生命中的最后时刻。
It happened about 70 million years ago.
故事发生在大约七千万年前。
At the top of the world, the first ice caps formed, reaching down to what is now modern day Canada.
在世界的顶端，第一次形成了冰帽，延伸到了今天的加拿大。
South of the Arctic Circle, the land was inhabited by dinosaurs.
在北极圈以南，陆地上居住着恐龙。
Winter cloaked the terrain in total darkness.
寒冬让大地笼罩在一片漆黑之下。
Snow and ice forced dinosaurs to migrate into modern-day Canada to escape the harsh conditions.
冰雪迫使恐龙迁徙到了如今的加拿大，来躲避如此严酷的条件。
As they headed south, they were chased by two killers.
随着它们南下，两个杀手循踪而来。
One, a predator. The other, the disintegration of the Arctic world.
其一，是个掠食者。另一个，则是北极世界的瓦解。
In the summer of 1986, in Pipestone Creek, in Northwest Alberta, Canada, A team of paleontologists on a routine dig made a startling discovery:
1986年夏天，在加拿大阿尔伯塔西北的派泊斯通溪，一队古生物学家在例行挖掘中有了惊人的发现：
The remains of an entire herd of dinosaurs, over three and a half thousand of bones, with up to 100 bones packed in per square meter, including 14 skulls in total.
一整群恐龙的遗骸，三千五百多块骨头，平均每平方米有一百多块骨头，总共有十四个颅骨。
It's one of the most spectacular dinosaur finds in history.
这是史上最壮观的恐龙发现之一。
They quickly identify the dinosaurs as Pachyrhinosaurus - heavily skulled predecessors of Triceratops.
他们很快鉴别出这些恐龙是肿鼻角龙，是三角龙的祖先，其头骨厚重。
A typical adult measured about 7 meters long, stood about 2 meters tall and weighed as much as 4 tons.
典型的成年肿鼻角龙长约七米，站立时有两米高，重可达四吨。
This thing is built like a truck, but a truck with a big spike sticking out of the end of it.
这家伙就像是卡车一样，不过这辆卡车尾部还支出一个大的尖刺。
So if you were unfortunate enough to be in front of a charging Pachyrhinosaurus, it would be like standing in front of a truck that's coming at you at 25 miles an hour.
要是你运气不好站在猛冲的肿鼻角龙的前方，那就相当于站在一辆以时速25英里冲向你的卡车前面。
