TED演讲:和老年痴呆症说再见(6)

What about sleep? In slow-wave deep sleep, our glial cells rinse cerebral spinal fluid throughout our brains, 关于睡眠呢？在慢波深度睡眠时，我们的神经胶质细胞冲洗着我们大脑中的脑脊液， clearing away metabolic wast

SSS 2008-12-16

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Sarah Palin on the campaign trail was at times dismissive of science. She attacked fruit fly research, saying that tax dollars were going to projects h

SSS 2011-01-27

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Generations of American children have been told, Eat your broccoli! And for decades, researchers have known that broccoli and related vegetables like cauliflower and water

SSS 2011-03-25

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? It's been more than a decade since the human genome was published. And some critics have wondered where the promised medical applications are. Well, a review article in

SSS 2012-07-25

This is Scientific American's 60 seconds science. I'm Ian Chant. Got a minute Secret identities aren't just for superheros anymore. Researchers have found that protein present in everything from amoebas to people is living the double life. Once it bi

SSS 2010-04-20

Hows this for a possible new culprit for breast cancer sufferers: they may be able to blame their grandmas diets. Thats the implication of a study done with rats. Researchers affiliated with the Georgetown University Medical Center fed a group of pre

SSS 2009-08-28

You cant judge a book by its cover. But you can judge a dog by its coat. You can even read right through to its genes. Because a study in the August 27th online issue of Science shows that just three key genes govern the length and texture of dog fur

为什么总感觉睡不够?

人的一生中，将近三分之一的时间是用于睡觉的。刚出生的婴儿几乎每天要睡20个小时；即使成年后，每夭至少要睡 6～7小时。 不管睡眠时间长短如何，睡觉看来是人必不可少的行为。这一点

经济学人:奥巴马尝试改造美国的学校

Education policy 教育政策 Final exam期终考试 As elections loom, Barack Obama tries to reform Americas schools 随着选举临近，巴拉克-奥巴马尝试改造美国的学校 AMERICAS schools are dotted with stories of progress. In Decembe

谷歌大佬在研究长生不老？硅谷有这黑科技？

Google co-founders and Silicon Valley billionaires try to live forever 谷歌联合创始人们的长生不老之梦 One hundred and fifty thousand people die every day, reports Tad Friend of The New Yorker in the article, The God Pill: Silicon Valle

苹果iWatch呼声最高的5大功能

Given all the buzz, you'd think an iWatch from Apple would be a case of when rather than if. In theory, such a device could push computing forward. Users could check messages and get alerts and directions without having to whip out their iPhones. (An

SSS 2008-05-20

This is scientific American's 60-Second Science, I'm Karen Hopkin, this'll just take a minute. If theres anything better than a fresh, ripe, tomato, its a gigantic fresh, ripe tomato. And thanks to a couple of mutations, thats exactly what we all enj

SSS 2009-10-09

If the human genome were put in a straight line, it would be over six and a half feet long. So how do you store all that DNA in a tiny nucleus? And have the cell manage it? Researchers explain how in a study featured on the cover of the October 9th i

SSS 2009-03-17

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. People get malaria from Anopheles mosquitoes that themselves are infected with a protozoan parasite called Plasmodium. The mosquitoes do have immune sy

SSS 2010-11-08

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? One of the dreams of biomedical scientists is to be able to transform adult cells into other kinds of cells. And thus avoid some of the ethical concerns of working with

SSS 2009-01-20

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. For years, scientists and physicians have been up in arms about the rise in antibiotic resistance. Seems that many bacteria, devious buggers that they ar

SSS 2009-01-19

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. A new study with worms shows that some have a gene that helps them stave off infections. Not through some kind of biochemistrybut by changing their behav

超级富豪也将成为健康超人

If the human genome is the book of life, then Crispr technology is its Microsoft Word. The cut-and-paste technique, invented only three years ago, can be used on fledgling genomes to snip out bits of DNA and, if required, insert new stretches. 如果说

科学家发现基因决定人们对咖啡的需求

Whether a cup of java will leave you craving more could be chalked up to your genes. 一杯咖啡是否会使你上瘾也许是由你的基因决定的。 People with a newly identified genetic variant in their DNA, called PDSS2, may be inclined to d

经济学人251:医药公司和癌症 利润丰厚的救星

Drug firms and cancer Lucrative lifesavers 医药公司和癌症 利润丰厚的救星 The hopes and perils of betting on cancer treatments 癌症治疗的希望和风险 NEW weapons are emerging in the war on cancer. 在对癌症的战争中不断有新