标签:SSS 2012-01-17 相关文章
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Can we be too clean? According to what's called the hygiene hypothesis, yes. Without being challenged as kids, our immune systems don't flourish. Scien
This is Scientific Americans 60 Second Science, I am Cynthia Graber, this will just take a minute~ Want to suss out the existence of a shy mammal in a tropical jungle? Just check a bloodsucking leech. Scientists estimate that about a quarter of the w
As it ages, white paper turns distinctive of yellow, but why? To find out, scientists artificially aged modern paper to rebuild the changes on the molecular level, the researchers in the Journal physical review of letters, for 48 days, 3 unpleached p
This is Scientific American 60 Seconds. I'm Cynthia Graber. This'll just take a minute. In Europe and the near east, people went from being mobile hunter gathers to more settled agriculture way of life. But in Africa, no matters domesticated animals
This is Scientific Ameican 60 second Science, I'm Cynthia Graber, this will just take a minute! Cave painting connects us with our prehistoric artist ancestors. But there's a dearth of such illustration in the Americas. Now a cave in Brazil has been
Cave painting connects us with our prehistoric artist ancestors. But there's a dearth of such illustration in the Americas. Now a cave in Brazil has been found to house the oldest New World image known. The shelter was excavated from 2002 to 2009. In
This is Scientific American 60 second Science, I'm Sophie Bushwick, got a minute In the lab, female rodents sometimes terminate their pregnancies after being exposed to new males. Its called the Bruce effect, for researcher Hilda Bruce. Now a study i
This is Scientific American 60 second Science, I'm Steve Mirsky, got a minute? In science, citations are gold. A journal article that gets cited a lot is usually considered a valuable piece of work. Now comes a study claiming that the number of times
This is Scientific Americans 60 second Science, i am Cynthia Graber, this will just take a minute~ When you hear Western music, you generally get the emotional tone. A major key is happy. (music plays) A minor one? Thats sad. (music plays) And spoken
This is Scientific American 60-second Science.I'm A.L.Got a minute? A nice glass of saki might not make figure of your dug.The bosom has resulted belong demascation processors.Humans have demascatered on off louder organisms from paths to grains to t
This is Scientific American's 60 second science. I'm Steve Mirsky. At the Lindau Nobel Laureate Meeting at Lindau Germany. This will just take a little bit more time than our usual may?. Edmond Fischer won the Nobel Prize in Physiology of Medicine in
We Americans love our fast food. And a new study shows that a little thing like a nutrition label is not gonna stop us when we want a breakfast burrito. In January 2009 King County, Washington imposed mandatory menu labeling on all restaurant chains
This is Scientific American 60 Second Science, I'm Cynthia Graber, this will just take a minute~ You know the sceneits a Friday night, and your date just canceled. Youre bummed, maybe a little hurt. You think now might be a good time for a beer, mayb
This is Scientific American 60 Second Science, I am Sophie Bushwick, got a minute? Typing can be tough for your handsbut can it also mess with your head? Researchers have discovered that words typed on the right side of a QWERTY keyboard, for example
This is Scientific Americans' Sixty-Second Science, I'm Christopher Intagliata, got a minute? Vampire spiders, as the name suggests, like blood. And they feast on blood-filled mosquitoes to get it. But only female mosquitoes suck blood. So how do spi
This is Scientific American 60 science, I am Charles Q. Choi! Psoriasis is an autoimmune diseasethe immune system mistakenly attacks its own body, causing red, itchy, scaly patches on the skin. But there may be a hidden upside. People with psoriasis
This is Scientific American's 60-Second Science. American is still far short of the recommend daily portions of food and vegetables, and kids are no ...veggies at school cafateria. So researches tested whether visual cuse at hopeful foods could incre
This Scientific Americans 60 senconds science. I'm Cythia Graber. This will just take a minute. How did the zebra get stripes. One theory holds that stripes help confused predators. But stripes might be primarilly to protect zebras from ferocious ins
This is Scientific American's 60-Second Science. I'm Sophine Bushwick. Got a minute? Crickets make a big contribution to the sounds of a summer night. And theyve been doing so for some 165 million years. Now paleontologists have reconstructed the son
This is Scientific American 60 second science, I am Christopher Intagliata, got a minute The sounds many animals make are determined by their genesthey don't have to learn them. Humans, on the other hand, have all sorts of languages and accents, stuf