科学美国人60秒 SSS 人类回声器原理类似蝙蝠回声

Human Echolocators Use Tricks Similar to Bats Many bats use a system similar to sonar to navigate in the dark. They send out high frequency sound, sometimes as clicks, and get information about their surroundings by the timing and quality of the soun

发表于:2019-02-14 / 阅读(62) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 数学会破解指关节开裂声音的奥秘

Math Cracks a Knuckle-Cracking Mystery Knuckles cracking. You may not mind the sound. You may despise it. Or you could study it. 指节开裂。你可能没有注意到它的声音。 你可能会鄙视它。 再或者你可以研究它。 Couple yea

发表于:2019-02-14 / 阅读(66) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 有着天才个性的乌鸦

Ravens Crow with Individual Flair There's a well-known conspiracy of ravensthat's what you call a group of ravensthat likes to hang out near a zoo in the Austrian Alps. Every day these ravens conspire to steal the food that's set out for the wild boa

发表于:2019-02-14 / 阅读(86) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 寒潮塑造蜥蜴幸存者

Cold Snap Shapes Lizard Survivors In January 2014, an epic cold wave swept across the southeasta snowpocalypse so severe that thousands of drivers in Atlanta abandoned their cars on icy highways and Interstates. 在2014年1月，一场被称为末日暴

发表于:2019-02-14 / 阅读(68) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 北极热浪与雪风暴有关

Arctic Heat Waves Linked to Snowpocalypse-Like Storms February was unusually hot in the arctic. Thawing out temperature: 35 degrees Fahrenheit.It made big news when it got to 35, I don't know if that's t-shirt weather yet, but 北极在二月时异常炎

发表于:2019-02-14 / 阅读(61) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 无人机的生物用途

Drones Could Help Biologists Tally Birds Ecologists crouching quietly amidst vegetation, using binoculars to tally birds in a roost, may soon be a charming relic of the past. Because a new study shows that, when it comes to getting an accurate avian

发表于:2019-02-14 / 阅读(73) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 多活多遭罪?!

Life Extension May Add Just Bad Time Living longer doesnt necessarily mean living better. Thats the lesson from the tiny roundworm called C. elegans, long a workhorse in basic biology lab work. The research is in the Proceedings of the National Acade

发表于:2019-02-14 / 阅读(64) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 唾液蛋白可能抑制肠道无序状态

Saliva Protein Might Inhibit Intestinal Anarchy 唾液蛋白可能抑制肠道无序状态 Every day, you produce one to two liters of spit. It kick-starts digestion and helps you swallow. And it helps prevent bacterial infection in your mouth. 每天，

发表于:2019-02-14 / 阅读(63) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 寻找天外之山

Searching the Heavens for Mountains In the last few decades, astronomers have discovered thousands of exoplanets orbiting other stars. Now, scientists want to know what they look like. Do they have oceans? Atmospheres? Researchers have even searched

发表于:2019-02-14 / 阅读(60) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 萌宠猫咪

Psychologist Saho Takagi, a graduate student at Kyoto University in Japan, strolls into one of Japan's many cat cafes. These establishments allow customers to pay an hourly fee for the chance to cuddle some cats. They're popular in Japan because so m

发表于:2019-02-14 / 阅读(71) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 通过腐肉可洞察石化过程

Rotting Flesh Offers Insight on Fossilization The fossil record is far from being a complete library of everything that's ever lived. 化石记录不止是曾经存活生物的藏书阁. The vast, vast majority of everything that's ever lived has com

发表于:2019-02-14 / 阅读(105) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 生物多样性的信息随时间变化

Needed: Info on Biodiversity Change over Time We find that the composition of ecosystems around the world is changing much more rapidly than we expected. Indeed, much more rapidly than ecological theory predicts. 我们发现，世界各地生态系统

发表于:2019-02-14 / 阅读(59) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 大城市人均推文减少

Big Cities Have Fewer Tweeters Per Capita Walking in New York City is almost a competitive sport. And people in cities really do walk faster than their country counterparts2.8 feet per second faster, according to a worldwide study in the 1970s. But t

发表于:2019-02-14 / 阅读(66) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS NRA会议期间枪击事件下降

To See Gun Injury Drop Hold An NRA Meeting The annual meeting of the National Rifle Association is coming up in May. It's scheduled for Dallas. And if past events are any guide, gun injuries may actually go down in Texas, during the event.When a conv

发表于:2019-02-14 / 阅读(64) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 船只噪音干扰鱼儿学习

Boat Noise Means Fish Can't Learn Their Lessons If you've ever gone snorkeling or scuba divingyou know how peaceful it sounds under there... aside from the crackling sound of snapping shrimp. 你如果浮潜或者潜过水，就会知道水下听起来

发表于:2019-02-14 / 阅读(54) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 别忘了退后一步看问题

Animal Coloration Can Serve Double Duty Nature may be red in tooth and claw. But one plucky caterpillar dresses in orange and black to avoid becoming somebodys lunch. Whats really surprising, though, is that this distinctive set of stripes can serve

发表于:2019-02-14 / 阅读(152) / 评论(0) 分类 2018年科学美国人3月

科学美国人60秒 SSS 科学合作 无所不能

Worldwide Effort Says Together Science Can Collaboration in science across the world is the key to a better world in the future. Doesnt matter whether its drug resistance or climate change or social inequalities. All of these, I believe, can be broac

发表于:2019-02-14 / 阅读(61) / 评论(0) 分类 2018年科学美国人3月
最新学习文章
热门学习文章