Because, like we've already seen, saberteeth are one of evolution's greatest hits.

因为，就像我们已经看到的那样，剑齿虎是进化史上最伟大的作品之一。

But when it comes to saberteeth, the question is… why?

但说到剑齿虎，问题是… … 为什么？

Between then and now, there were basically three different kinds of terrifying, cat-like predators, each of which had evolved their own saberteeth.

从那时到现在， 基本上存在三种不同的可怕的猫科掠食者，每一种都进化出了自己的剑齿。

And over the eons, saberteeth have also shown up in herbivores like the strange, horned Uintatherium, primates like lemurs and baboons, and about 4 million years ago in the Pacific Northwest, there was even a species of sabertooth salmon.

千百年来，剑齿虎也出现在食草动物身上，比如奇怪的、有角的 Uintatherium， 灵长类动物， 比如狐猴和狒狒，大约 400 万年前， 在太平洋西北部，甚至出现了一种剑齿鲑鱼。