It was a human bone. A lower jaw.

一块人的头。一块下颌。

But no human beings today have jaws like this one.

但现在没有人有这样的下颌了。

The fossil find is a piece of jawbone, with a tooth, from a dromaeosaur.

这次发现的化石是带有一颗牙齿的奔龙颌。

It's anchored well on the bone and the jaw is about this deep.

它非常结实地嵌在头上颌大概这么深。

However, those finds were limited to jaw parts and loose teeth.

然而，这些发现物只是部分颌和一些零散的牙齿。

Researchers have, however, managed to find sets of teeth and partial jaws.

但是，研究人员设法找到了巨猿的牙齿和部分颌。

What happens is that the root is anchored well into the lower jaw.

实际情况就是这个牙根深深地嵌在其下颌上。

So as our jaws shrank, we still kept all 32 teeth.

所以即使我们的颌萎缩，我们仍然保有 32 颗牙齿。

Their head and jawbones capture vibrations and transmit them directly into the ear.

它们的头部和颌捕捉振动并将其直接传递到耳朵中。

Then we'll move down to your mandible, it helps you chew food.

接下来，我们来看一下帮助你咀嚼食物的下颌。

He's got massive jaw muscles. He's designed for cracking through bone.

颌上的肌肉发达。它能够咬穿头。

Way in the back of our jaws, behind our premolars, we have teeth called molars.

在我们颌的深处，前磨牙的后面，有一种牙齿叫做磨牙。

Another bone found in Baishiya Karst Cave is a lower jaw bone of a young Denisovan.

在白石崖洞穴发现的另一块头是年轻丹尼索瓦人的颌。

Whoever owned it must have been able to bite really hard.

这块下颌所属的那个人啃咬起食物来一定很有劲。

They have to wait until our jaw is developed enough to handle the strain of their arrival.

它们必须等到我们的颌发育足够强壮，才能承受它们的生长压力。

Here's another example from Mike Mew where the maxilla was brought forward, again without surgery.

这是 Mike Mew 医生，下一个案例医生同样没有借助手术就使上颌向前生长。

Those mandibles go from 0 to 200 miles per hour in point zero-zero-zero-zero-one-five seconds.

这些下颌在 0.000015 秒内从 0 加速到每小时到 200 英里。

Our ancestors, like our living cousins, had bigger and broader jaws.

我们的祖先，和我们现代近亲动物一样，拥有宽大的颌。

But exactly why our jaws became smaller is a bit of a mystery.

颌变小的确切原因仍是一个谜。

Some have strong armor, deathly stingers, or sharp mandibles.

他们的武器是大自然给予他们的。有些人的装甲坚硬，致命的刺痛或尖锐的下颌。