CDC is afraid to fund firearms research. 疾控中心是害怕得到武器研究的经费资助。 David Hemenway, professor of health policy at the Harvard T.H. Chan School of Public Health. 大卫海明威是美国哈佛大学公共卫生学院卫生

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科学美国人60秒 SSS 嗅觉——鲨鱼导航秘诀

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LSD is one of the most potent hallucinogenic drugsactive at just around 100 microgramsa miniscule amount. That fact has fascinated pharmacologists for decades. Namely, how can it have such long-lasting effects12 hours or moreat such tiny doses? 麦角酸

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科学美国人60秒 SSS 墨西哥湾“死区”对虾业的影响

Every spring, the Mississippi River dumps tens of thousands of tons of nutrient runoff into the Gulf of Mexico. Add temperature, current and wind to that pollution, and you have the Western Hemisphere's largest stretch of oxygen-poor watersa so-calle

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Voice is generated by a complex and beautiful biological system, and this is a system that allows all of us to communicate messages, concepts, and emotions. 声音是由负责、美丽的器官系统产生的，该系统可以让我们交流信息、想

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You've probably seen pictures of Greek villages, where every house is painted bright white. The paint reflects the intense sunlight of the Mediterranean. And it works pretty well to keep the houses from heating up in the sun. But it doesn't actively

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Time spent in zero G changes the body: Astronauts come home with bone loss and muscle weakness. But what happens in their heads? To find out, researchers examined MRIs of astronauts brains taken before and after flight. They looked at 12 astronauts w

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[科学美国人60秒] SSS 2015-10-13

If you are lost, you need a map and a compass. The map pinpoints where you are and the compass orients you in the right direction. Migratory birds, on the other hand, can traverseentire hemispheres and end up just a couple of miles from where they br

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[科学美国人60秒] SSS 2015-10-12

Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10到30积分的奖励! Thank you！

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[科学美国人60秒] SSS 2015-10-09

Wilder protected areas get eight billion visitors a year, and that's just on land. Underwater reserves? add a million to the tally, which, considering these are protected areas, seems like an insane number of people. It isn't insane. Dane Blumstaine,

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