So in Australia, there were also these thylacines.

澳大利亚当时也有袋。

In Australia, there were these thylacines. There are these marsupial lions, and I think a big body size would have enabled them to escape predation.

澳大利亚有袋，也有袋狮，我认为雷鸟巨大的以让它们逃脱被捕食的命运。

Meet the thylacine, also known as a Tasmanian Wolf, or Tasmanian Tiger, a medium-sized meat-eating mammal that as recently as the early 1900s lived on the island of Tasmania.

我们来了解一下袋， 也称为塔斯马尼亚或塔斯马尼亚虎，这是一种中食肉哺乳动物， 20 世纪初还生活在塔斯马尼亚岛上。

In Australia, there were also these thylacines .

在澳大利亚，也有这些袋。

And the wolf-like body of the thylacine?

那么袋的身像一样吗？

But that isn't what makes the thylacine so interesting.

但这并不是袋如此有趣的原因。

But even though evolution doesn't march toward some ideal form, I've gotta say: thylacines are particularly awesome.

但即使进化并没有朝着某种理想形式发展，我还是必须说：袋尤其令人惊叹。

Unfortunately, local farmers liked their sheep more than the thylacine, and eventually they were hunted to extinction.

不幸的是， 当地农民更喜欢绵羊而不是袋，最终袋被捕杀殆尽。

The last known thylacine died at a Tasmanian Zoo in 1936.

最后一只袋于1936年在塔斯马尼亚动物园死亡。

The thylacine is about as distantly related from a wolf or a fox as it can be and still be a mammal.

袋与或狐狸的亲缘关系尽能远，但仍属于哺乳动物。

Despite coming from different ancestors, the wolf and thylacine independently evolved this analogous trait: walking on their toes.

GS：尽管来自不同的祖先，和袋却独立进化出了这种类似的特征：用脚趾行走。

Analogous similarities are the result of convergent evolution, and one of the most striking examples is in how the wolf and thylacine walk.

类似的相似性是趋同进化的结果，其中最引人注目的例子就是和袋的行走方式。