This is Scientific America 60-second science, I'm Sophie Bushvick, got a minute? All humans evolve to find certain female traits attractive across cultures because the signal of potential means reproductive potential. Right? Actually a new study find

发表于:2018-12-24 / 阅读(160) / 评论(0)

未知分类

美国科学60秒 SSS 2013-08-30

Everywhere you go, the trillions of microbes in your gut go, too. And that's a comforting thought, because according to a new study, a more diverse population of intestinal bacterias is linked to better health. The work is in the journal Nature. Dani

发表于:2018-12-24 / 阅读(148) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-29

This is Scientific American 60-second Science,I'm Gretchen Cuda Kroen,got a minute?The last time you splurged on a live lobster for dinner ,you might not have given any thought to how much the little guy was going to suffer as he boiled to death.Unti

发表于:2018-12-24 / 阅读(166) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-28

This is Scientific American 60-second Science,I'm Gretchen Cuda Kroen,got a minute?Sharing syringes is a big no-no.Despite the warnings,needles sharing among injection drug users are still a significant cause for the spread of HIV and other infectiou

发表于:2018-12-24 / 阅读(192) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-25

This is Scientific American 60-second Science,I'm Sophie Bushwick.Got a minute?Scientists have used synthetic DNA to store digital files,including a photo,Shakespeare's sonnets and an audio recording on Martin Luther King. And the pursuit of happines

发表于:2018-12-24 / 阅读(226) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-24

This is Scientific Americans 60 second Science, I am Christopher Intagliata, got a minute. Sailors don't need to read the stars anymorethey've got GPS. But dung beetles do not have GPS. And it now appears that they use the Milky Way as a compass. Dun

发表于:2018-12-24 / 阅读(161) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-23

This is Scientific Americans 60 second Science, I am Karen Hopkin, this will just take a minute. Since the first human genome sequence was published, thousands of people have submitted their DNA for scientific analysis. They made these donations anon

发表于:2018-12-24 / 阅读(175) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-22

Medicinal tablets are nothing new. Doctors have been dispensing pills for thousands of years. And now archaeologists have turned up some of those ancient medicines, which were preserved in a shipwreck for close to two millennia The 2nd-century Pozzin

发表于:2018-12-24 / 阅读(157) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-21

发表于:2018-12-24 / 阅读(151) / 评论(0)

未知分类

美国科学60秒 SSS 2013-02-27

As many San Franciscans have noticed, sourdough bread stays fresher longer than the regular stuff. Sourdoughs extended freshness is due to extra fermentation that traps more moisture in the dough. But now we know that sourdoughs longevity is also bec

发表于:2018-12-24 / 阅读(163) / 评论(0)

未知分类

美国科学60秒 SSS 2013-02-26

About 5,000 years ago in Peru, culture kicked into high gear. During whats called the late Archaic period, South Americans formed permanent communities with complex architecture, religion and agriculture. And now scientists have shown that maize play

发表于:2018-12-24 / 阅读(153) / 评论(0)

未知分类

美国科学60秒 SSS 2013-02-25

The best value for money in cooking equipment, in my mind, is first a digital scale and digital thermometer. Theyre both about $20. They help you cook so much more accurately that theyre both enormously valuable. Nathan Myhrvold is the former chief t

发表于:2018-12-24 / 阅读(170) / 评论(0)

未知分类

美国科学60秒 SSS 2013-03-14

This is Scientific American 60 second Science, Im Sophie Bushwick. Got a minute? It was thought that saltwater seas separated Central and South America millions of years ago. But a recent discovery may render that idea all wet. Because archaeologists

发表于:2018-12-24 / 阅读(150) / 评论(0)

未知分类

美国科学60秒 SSS 2013-03-20

This is Scientific American 60 second Science, Im Christopher Intagliata. Got a minute? Olive oil is thought to be healthy because it's mostly monounsaturated fat. But cold-pressed extra-virgin olive oil may have an extra benefit: it appears to be mo

发表于:2018-12-24 / 阅读(151) / 评论(0)

未知分类

美国科学60秒 SSS 2013-01-31

When you think about dog food, you probably picture more meet than potato. But a new study finds that unlike wolves, dog have genes allow them to digest starch. That evolutionary adaptation may help fuel domestication. The report is in the journal na

发表于:2018-12-24 / 阅读(151) / 评论(0)

未知分类

美国科学60秒 SSS 2013-03-21

This is Scientific American 60 second Science, Im Steve Mirsky Nothing was on the table at the annual Isaac Asimov Memorial Debate March 20th at theAmerican Museum of Natural History in New York City. Heres Hayden PlanetariumDirector Neil deGrasse Ty

发表于:2018-12-24 / 阅读(156) / 评论(0)

未知分类

美国科学60秒 SSS 2013-03-25

This is Science American-60 minute Science, I'm Sofie Bushway. Got a minute? Roosters greet the rising sun with Ohh, but they also crowed at other times, so are they responding to the light or do they simply know that it's morning. New research sets

发表于:2018-12-24 / 阅读(140) / 评论(0)

未知分类

美国科学60秒 SSS 2013-03-26

Teachers might want to think twice about posting 'no gum chewing' signs in the classroom. It turns out that the sticky substance might help students concentrate. Researchers had two groups of 20 people each listen to a 30-minute recording that includ

发表于:2018-12-24 / 阅读(143) / 评论(0)

未知分类

美国科学60秒 SSS 2013-03-27

A heavy metal concert might be a tough place to think about physics.especially at the marsh pit while some audience members were dancing violently.But the marsh pit itself actually is interesting place to find physics and actions.and not just four se

发表于:2018-12-24 / 阅读(144) / 评论(0)

未知分类

美国科学60秒 SSS 2013-03-28

In southwestern African namely,desert,the lack of rainwater keeps grass sparks.but in some areas,mysterious rain brings grass with bare center appeared thrive. Now scientists sub discovery the so called the very circles are decreased by wearied littl

发表于:2018-12-24 / 阅读(151) / 评论(0)

未知分类