It was a human bone. A lower jaw.

骨头。下颌骨。

But no human beings today have jaws like this one.

但现在没有有这样下颌骨了。

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

这次发现化石是带有颗牙齿奔龙颌骨。

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

它非常结实地嵌在骨头上颌骨大概这么深。

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

然而，这些发现物只是部分颌骨和些零散牙齿。

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

但是，研究员设法找到了巨猿牙齿和部分颌骨。

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骨上。

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

所以即使我们颌骨萎缩，我们仍然保有 32 颗牙齿。

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

它们头部和颌骨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，我们下帮助你咀嚼食物下颌骨。

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

颌骨上肌肉发达。它能够咬穿骨头。

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

在我们颌骨深处，前磨牙后面，有种牙齿叫做磨牙。

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

在白石崖洞穴发现另骨头是年轻丹尼索瓦颌骨。

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

这下颌骨所属那个啃咬起食物定很有劲。

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

它们必须等到我们颌骨发育足够强壮，才能承受它们生长压力。

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

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

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

这些下颌骨在 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.

我们祖先，和我们现代近亲动物样，拥有宽大颌骨。

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

颌骨变小确切原因仍是个谜。

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

他们武器是大自然给予他们。有些装甲坚硬，致命刺痛或尖锐下颌骨。