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There is always one telltale feature of all predator traps.
所有掠食動物陷阱都有一個標志性的特點
They trap and kill every animal that is unlucky enough to cross their path.
它們困住并殺死不幸落入其中的動物
They contain the bones of many different species of animal that lived for miles around.
因而肯定埋有相隔很遠的許多不同物種的骨骼
Over the last century, we've recovered more than three and a half million fossils,
在上個世紀，我們發掘了350萬塊化石
representing more than 650 species of animals and plants.
它們屬于650多種動植物
And they include a great diversity of animals,
其中包括多種大型動物，
mammoths, mastadons, sabre-tooth cats, lions, dire wolves and so on.
猛犸象、乳齒象、劍齒虎、 獅子、恐狼等等
If Currie's team discovered many different species of animal at their site,
如果Currie的研究小組在化石場發現多種不同的動物
they would have to consider whether they were simply the leftovers of a deadly predator trap.
他們就必須承認這里只不過是一個掠食動物陷阱的遺跡
But after three years of painstaking digging, there's been one extraordinary finding about this site.
不過經過3年的艱苦挖掘，他們在此有了重大發現
So far, all of the animals that we've found in here as parts of skeletons
目前我們在這里找到的所有動物骨骼
are one species, and that's this big meat-eater, a tyrannosaur known as Albertosaurus.
都來自同一物種，它是大型食肉恐龍，一種叫阿爾伯脫龍的暴龍
There are no other carnivorous dinosaurs in this bone bed.
化石場中并沒有其它食肉恐龍
And given that we're dealing with only one type of carnivore, we can rule out things like predator traps.
這說明我們是在挖一種食肉恐龍，我們可以排除掠食動物陷阱之類的情況
It's almost certain that these dinosaurs died here together because they were living together.
幾乎可以肯定這些恐龍是在這里一起死去，因為它們也在一起生活
