The mighty carnivores ruled a dangerous world of Cretaceous Period.
强大的食肉动物统治着白垩纪的凶险世界。
But being a super predator like Tyrannosaurus Rex is not easy.
即使作为顶级捕食者的雷克斯霸王龙也不轻松。
Just surviving to adulthood is a major feat,
能活到成年就是个巨大胜利，
one that takes a decade or more of killing and eating some of the meanest creatures that walk the earth.
这要几十年不断捕食地球上其它弱小的动物。
The hardest role in the ecosystem is top predator. Most of the time, you are almost starving.
食物链中最难的角色就是顶端的捕食者。很多时候它们都面临饥饿。
A carnivore knows that no prey animal gives up easily.
食肉动物都知道猎物不会轻易投降。
Herbivores fight fearlessly because their lives depend on it... These animals have to defense it.
食草动物会奋力反抗，因为它们的性命悬此一线...它们必须反抗。
Ankylosaurus is a slow lumbering plant eater.
甲龙是种行动迟缓的食草动物。
It's long slow body is covered in bony plates, and its tail packs a punch.
它又矮又长的身体布满骨片，尾巴上长了个锤子。
Ankylosaurus itself has a huge mass of bone at the end of its tail
甲龙本身在尾部的末端有一团骨头，
and there is no leg bone of Tyrannosaurus would stand it.
这可是任何霸王龙的腿骨都承受不了的。
Predators of Cretaceous are gigantic by our standard.
在我们看来白垩纪的食肉动物都是巨大的。
Yet its stature that clearly outclassed by plant eaters.
而身材更庞大的是食草动物。
Carnivores though have one significant advantage. They got brains.
食肉动物有一个突出的优点。大脑发达。
The armered dinosaurs are general, and Ankylosauruses, no exception here, were not bread dinosaurs.
有甲壳的恐龙很常见，甲龙也不例外，不会坐以待毙。
They're probably the dumbest dinosaurs.
它们估计是最愚蠢的恐龙了。
Their brains are really small for the size of their heads and their bodies.
跟身体和头部的大小比起来，它们的大脑实在太小了。
With preys so stupid, preditors don't need to be geniuses.
猎物如此低能，猎手也无需太过聪明。
Ultimately you really only need to be as smart or smarter than the animals that you are around.
说到底，你只需跟周围的动物 一样聪明，或者更聪明一点儿。
7 tons of Tyrannosaurus Rex can do a lot of damage,
7吨重的雷克斯霸王龙破坏力极强，
but a little lecture of brain would make a lot of differences.
了解其大脑构造就感觉不一样了。
A T. Rex's brain is actually a bit larger than a banana.
雷克斯霸王龙的大脑其实只比香蕉大一点。
A T. Rex's brain is just a thousandth of its body size.
雷克斯霸王龙的大脑只占其身体的千分之一。
Twenty times less brain power than human's.
智力水平比人类低二十倍。
Yet it's significantly larger than that of its plant-eat prey.
但这比它的那些食草猎物的大脑大多了。
What we see in T. Rex is the advance of carniore capabilities were greater,
我们在霸王龙身上看到了食肉动物的能力更强，
its ability to probably solve problems and deal with wrinkle and its evironment.
看到了它们这种解决问题和应对新情况和环境的能力。
Other carnivores are even more dependent on coordinative thought.
其它肉食动物则更依赖于协调能力。
