英语听力：2013-05-17 完美捕食 Perfect Predators —7

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Cannibalism² is the rule. It’s not the exception. If you’re a carnivore and there’s meat there, you take advantage of it. 

 

In fact, paleontologists have found ample evidence of cannibalism in the bones of these giants. 

 

We find tooth marks on the bones of T-Rex and parts of the bones missing on the T-Rex, and clearly they were eaten by another T-Rex. There’s nothing else that could have bitten those bones in half. 

 

Tyrannosaurus Rex is powerful and intelligent. But it’s also slow, lumbering³, and ponderous⁴, a predator⁵ that occasionally has to scavenge to survive. However, the age of dinosaurs⁷ is all about adaptation, and for one carnivorous killer⁸, survival means swapping⁹ size and muscle for speed, agility¹⁰, and razor-sharp weaponry. 

 

It’s a creature that proves that, in this prehistoric¹¹ world, death can come in any size. 

 

Deinonychus is a raptor, a birdlike predator covered in feathers. It’s 1.5 meters high, 3 meters long, and weighs 100 kilograms, tiny by dinosaur⁶ standards. Deinonychus is a hunter equipped with tools unlike any animal in the world today. Teeth, claws, speed … it has it all. 

 

Deinonychus, you have an animal that has very nasty sharp teeth and lots of them. And if that weren’t enough, it has enormous inner claws on its feet, as if it just couldn’t get enough weaponry. 

 

Deinonychus is more than just a well-armed carnivore. It’s intelligent. This predator can stalk a meal, plan out an attack, then take down prey¹² with deadly precision, even one of the largest plant eaters of all time, sauroposeidon. Its name means “lizard earthquake god”, and it can grow up to 19 meters in height and 50 tons in weight.

 

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