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In fact, in the Late Cretaceous, Triceratops outnumbered tyrannosaurs 10 to 1.
實際上，在白堊紀晚期，三角龍的數量達到了霸王龍的十倍。
Their success is down to one reason.
它們成功生存的原因只有一個。
A single thrust of the brow horn could penetrate right into the cardiac chamber or the lungs.
棕角只需一刺便可以刺穿心室或者肺部。
If you're gonna put a meter-long horn into a chest cavity of a T. Rex, the chance of you doing some damage are pretty great.
如果要把一根一米長的角刺入霸王龍的胸腔中，那么這根角便很有可能能造成很大傷害。
Tyrannosaurus Rex is stabbed in the eye.
霸王龍被刺中了眼睛。
The key element for any predator is go in, make the kill, get what they need, and do it without injuring themselves.
掠食者的黃金守則便是接近，獵殺，捕獲然后不要受傷。
For a carnivorous predator, losing an eye could be fatal.
對于一只肉食掠食者失去一只眼睛是致命的。
Back at the nest, the chicks are guarded only by the male.
而在巢穴旁，只有雄龍在看護著幼崽們。
Over him, a Quetzalcoatlus senses blood.
在它頭上，一只披羽蛇翼龍嗅到了血的味道。
On the ground, one parent is down and the other faces starvation.
在地上，雌龍已經受傷了，雄龍則面臨饑餓。
For a vunerable baby T. Rex, the situation couldn't get much worse.
對于柔弱的霸王龍幼崽來說現在是最糟糕的情況。
Sauroposeidon is the tallest land animal of all time.
波塞東龍是有史以來最高大的陸地動物。
At 17 meters high and 30 meters long, it would dwarf any living creature today.
它高達十七米，長達三十米，相比之下讓如今的動物都像侏儒。
But despite these mammoth proportions, its brain is tiny, weighing just over 100 grammes.
盡管其體格巨大，它的大腦卻很小，只有一百克重。
The brain size of Sauroposeidon would probably be about the size of a cheeseburger.
波塞東龍的大腦大約只有芝士漢堡那么大。
It probably had the smallest brain size to body size of any big animal that's ever lived. Big, dumb, brute.
那可能是當時所有大型生物中頭身比例最小的一種了。它龐大，呆滯，兇殘。
The Sauroposeidon's brain is 1,000 times smaller than its body, just 1/8 the brain capacity of a T. Rex.
波塞東龍的頭只有其身體的千分之一只有霸王龍腦容量的八分之一。
And its cerebrum, where strategic thinking takes place, is barely developed.
其進行復雜思維的大腦卻幾乎沒有發(fā)育。
I mean, these guys were, frankly, dumb as a fence post.
坦白地說，這些大塊頭真是蠢到家了。
