据一项调查显示，具有高智力的动物，寿命也比较长。这是怎么回事呢。北京新航道托福频道和大家分享托福阅读材料，希望通过这些材料，大家词汇量，知识储备和阅读能力。下面请看今天分享的材料，有关高智力长寿命的。下面请看。

　　A new study finds that mammals with larger brains—relative to body size—tend to live longer.

　　It’s been a question evolutionary biologists have spent years trying to answer: Why would nature favor the development of a large brain, something that requires more time to mature and uses up so much more energy? The classic thinking has been that large brains provide the sort of cognitive capacity needed to survive in an ever-changing environment, like the sudden loss of food or the appearance of a new predator.

　　Now scientists have added a new factor to consider. Large-brained mammals live longer than those with smaller brains and so can not only have more chances to reproduce, but also have a longer reproductive cycle to allow more time for child rearing.

　　The team analysed nearly 500 species of mammals from across the globe, from bats to felines, ungulates and marsupials.来源：北京新航道托福培训  And they found the correlation that indeed having a large brain makes for a longer life—the study was published this week in the Journal of Evolutionary Biology. The researchers analyzed other variables that could affect longevity like diet, environment, metabolic rates and found that the most significant predictor was brain size.

　　The authors stress, however, their finding is a correlation, and does not show causation. So on the one hand a larger brain favors a long lifespan but the opposite could also be true, that a longer lifespan favors a large brain.

　　In any event it seems size does matter, at least when it comes to grey matter.

　　托福课外阅读：高智力长寿命就是今天和大家分享的托福阅读材料，希望他们对于大家阅读能力起到帮助作用，预祝各位考生都取得理想的托福成绩，加油!

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