长寿之道:对未来充满希望 (1)
Hilary Tindle
Pittsburgh
Pennsylvania
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科学60秒:身体温暖保健康
As a bitter winter storm rages on the east coast, it’s hard to knock being warm-blooded. But what about the metabolic cost of maintaining a high body temperature? Well, a new study finds that we...
科学60秒:寻找“地球号”
If there's a line in Vegas on the odds of life on another planet, now might be a good time to -1-. A study in the journal Science examined 166 sun-sized stars and found nearly one in four had roc...
背诵美文——火力发电厂
Coal-fired Power PlantsThe invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel with which to generate large amounts of electr...
杜拜经历金融疼痛(1)
迪拜陷入财务困境 Hints: Dubai Nakheel United Arab Emirates Abu DhabiIn recent years, a shining city grew in the desert of Dubai on -- and even off -- the Gulf coast. An island shaped like a palm ...