英语听力：2013-07-21 《恐龙的战争》3 顽强防御—16

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Despite holding a deafening³ secret weapon, a Parasaurolophus, like other plant eaters, knows that the best way to stay alive is to keep predators⁴ at a distance. But in this prehistoric⁵ world, giant carnivores with ultra-keen senses and powerful, razor weaponry are everywhere.

 

Throughout the Cretaceous, hungry carnivores patrol the landscape. They are the most terrifying predators the world has ever known. Their plant-eating prey⁶, though, are well-armed and well-armored. They don’t give in without a fight. But prehistoric herbivores have a problem. They lack the brainpower of the carnivores that hunt them. Sauroposeidon’s brain is so tiny, it can barely process any information at all. So just how did these intellectually challenged giants cope in such a dangerous world? 

 

There has to be some sort of device that compensated⁷ for this diminished capacity to make individual choice, and it’s got to be society. 

 

Sauroposeidon defend themselves against super-predators by working and thinking together.

 

So you have group intelligence, group memory, group decision-making replacing individuality. 

 

Living as a group is vital for Sauroposeidon’s survival. Individually, their huge size…

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