科学美国人60秒 SSS 抱住大星系的大腿

Our galactic home, the Milky Way, is big. Mostgalaxies are far smaller. And its not easy being one of those little galaxiesa big galaxys gravity can rob their gas. And gas creates new stars, so losing gas spells the end of star-making. That's what ha

科学美国人60秒 SSS 大爱发酵食品

There are sort of three main ways that our species has developed to break down foods, or process foods, in a primordial way. And that is by cooking,by fermenting foods and by drying them or desiccating them. 我们人类有三种分解食物或处理食

科学美国人60秒 SSS Super Bowl Snacks Need These Exercise Equivalents

Super Bowl Sunday is almost here and theres one question on everyones mind: How can I tackle a plate of chicken wings without adding yardage to my end zone? Well, Charles Platkin is the director of the New York City Food Policy Center at Hunter Colle

科学美国人60秒 SSS Gulf Dead Zone Makes for Shrimpier Shrimp

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

科学美国人60秒 SSS 红细胞可“记住”并适应高海拔

Head to the mountains, and if the steep trails don't slow you down, the thin air will. There's less oxygen up thereso strenuous activity can leave you dizzy, out of breathor worse. But even though you're beat, biochemical processes are already busy a

科学美国人60秒 SSS Partnered-Up Men More Attractive to Women

It turns out the best looking thing on a man may be a good-looking woman. Researchers report that women find a man they see with an attractive woman more desirable than unattached men. Thats according to a study in the journal Evolutionary Psychology

科学美国人60秒 SSS 美国疾控中心对于枪支一直保持沉默

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

科学美国人60秒 SSS 嗅觉——鲨鱼导航秘诀

Sharks Head Straight Home by Smell嗅觉鲨鱼导航秘诀 Some sea creatures can find their way through thousands of miles of seemingly featureless oceans. Even more impressive is the route that they take. 一些海洋生物能够在茫茫的大海中

科学美国人60秒 SSS “盖子”的神奇之处

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

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

科学美国人60秒 SSS 未来声带研发方向

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

科学美国人60秒 SSS 吃零食须等价训练

Super Bowl Sunday is almost here and theres one question on everyones mind: How can I tackle a plate of chicken wings without adding yardage to my end zone? 超级碗星期天马上就要来临了，每一个人的心头都有这样一个问题：我怎

科学美国人60秒 SSS 香甜可口的咖啡

What's the liveliest part of your kitchen, in terms of harboring bacteria? Is it the cutting board? The dish sponge? Or maybe your coffeemaker? Because even though caffeine has antibacterial effects, it turns out espresso machines can harbor a whole

科学美国人60秒 SSS 降温层

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

科学美国人60秒 SSS 宇航员的大脑变化

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

科学美国人60秒 SSS 房地产市场繁荣破坏了鸟儿的情人节

Urban development is encroaching on forests in the Pacific Northwest. And its also ruining Valentines Day for some songbirds. Because urban growth is making it a challenge for some birds like the Pacific Wren to stay faithful to their partners, at le

科学美国人60秒 SSS Cool Coating Chills in Sunlight

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

科学美国人60秒 SSS 防晒霜加太阳伞才靠谱

Umbrellas Plus Sunscreen Best Bet to Beat Burns 防晒霜加太阳伞才靠谱 Last time you hit the beachand yeah, probably seems like a distant memory in the currently chilly parts of the worlddid you pack sunscreen? A beach umbrella? Or both? 上一

科学美国人60秒 SSS 有女友的男人更帅?

It turns out the best looking thing on a man may be a good-looking woman. 结果证明，男性身上最耐看的是旁边站一个漂亮的女性。 Researchers report that women find a man they see with an attractive woman more desirable than unatt

科学美国人60秒 SSS 看结容易 打结难

Knot Not Easy to Knot 看结容易 打结难 Of the many puzzles mathematicians ponder, one is new ways to tie knots. There are more than six billion different types of knots that have been tabulated by mathematicians. Six billion. David Leigh, a che