At night, the pit organs allow snakes to "see" an image of their predator or prey-- as an infrared camera does-- giving them a unique extra sense.

在夜晚，窝器能让蛇类“看到”捕食者或者猎物的图像——正如红外摄影机一样——赋予他们一个独特的额外感官。

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When experimental populations are set up under simple laboratory conditions, the predator often exterminates its prey and then becomes extinct itself, having nothing left to eat.

当实验种群在简单的实验室条件下建立起来时，捕食者往往会消灭它的猎物，然后自己也走向灭绝，因为没有东西可以吃。

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Low prey population levels then provide inadequate food for the predators, causing the predator population to decrease.

较少的猎物数量为捕食者提供了不足的食物，导致捕食者数量减少。

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"If you understand the distribution of these structures in the skin of a prey animal, you can understand something about predator-prey interactions, and it might explain some of the hadrosaur fossils we see with these bite marks, " he said.

BBC: Dinosaur mummy yields its secrets

In an ideal world, Mr Amory said, there would be no prey and no predator.

ECONOMIST: Cleveland Amory | The

Indeed, should its bid fail, Sanofi may find itself prey rather than predator, as a shareholder pact protecting it from takeover expires at the end of this year.

ECONOMIST: The right medicine? | The