The forests of British Columbia, Unesco says, are home to more life per square yard than anywhere else on Earth: elk, wolves, hawks, bears… Yet there was barely a bird in the trees.

联合国教科文组织认为，在不列颠哥伦比亚省每平方码的土地上，动物比世界上任何其它地方都要多：驼鹿，狼，秃鹰，熊…，然而我没有看见树上有一只鸟。

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More specifically, they say we will become 25 per cent happier with our life if a friend who lives within a mile of us becomes significantly happier with his or her life.

他们表示，更准确地说，如果居住在离你1英里内的一个朋友生活幸福感得到显著提升，你的生活幸福感就会增加25%。

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It found that smokers aged between 46 and 70 were 70 per cent more likely to suffer from Alzheimer's in later life compared to those who had never smoked.

发现年龄在46 - 70岁之间的吸烟者在晚年与从不吸烟者相比罹患老年痴呆可能超过70%。

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For one thing, if traffic is to continue to grow, as both the companies and the government hope it will, then the risk of more crashes and more lives lost will rise, and so the price per life of this investment will fall.

ECONOMIST: For the sake of a red light