研究表明,在晚上给老鼠给光照,老鼠会变得不那么活泼,而且会发胖。 Light at night increases mice's body mass, apparently by shifting food intake to times when the animals are less active. Karen Hopkin reportsYouve tried

发表于:2018-12-07 / 阅读(104) / 评论(0) 分类 60秒科学

Technology Report - New Research Hopes to Speed Development of HIV Vaccine This is the VOA Special English Technology Report. A team of scientists in the United States has created a new type of mouse that has an immune system similar to that of human

发表于:2018-12-07 / 阅读(58) / 评论(0) 分类 2012年VOA慢速英语(八)月

Sepsis is a severe infection that can often be fatal, particularly in obese patients. Now, a new study suggests why obese patients are at greater risk and suggests a possible new approach to treatment. 败血病是一种非常严重的感染,很多时

发表于:2018-12-19 / 阅读(57) / 评论(0) 分类 VOA双语新闻 2010年10月

Your nose may be the first place you think of as a source of mucus. But mucus is a major player in your gut, too. There's antimicrobial peptides and proteins that are present in there. Bacteria live in there and forage on the carbohydrates. And it's

发表于:2018-12-24 / 阅读(62) / 评论(0) 分类 2016年Scientific American(十一)月

Back in ancient times, philosophers like Aristoteles were early speculating about the origin of taste and how the tongue sends elements of taste, like sweet and bitter, salty and sour. What we discovered just a few years ago is that a region of the b

发表于:2018-12-24 / 阅读(43) / 评论(0) 分类 2015年Scientific American(十一)月

Out for the Count 失去知觉之后 If youve ever had major surgery, you probably remember lying down and waking upbut nothing in between. Thanks to the anesthesiologist, during the actual surgery you were out of it: immobilized and insensitive to p

发表于:2018-12-31 / 阅读(52) / 评论(0) 分类 英语听力文摘 English Digest

Is My Brain Static Or Constantly Changing? Scientists used to think that for all its complexity, the brain was pretty static. Once the brain matured, it essentially stopped growing and changing. And when neurons, or brain cells, were lost or damaged,

发表于:2018-12-31 / 阅读(55) / 评论(0) 分类 英语听力文摘 English Digest

By Carol Pearson Washington, DC 29 May 2006 watch Autism Gene report Researchers at the University of Texas Southwestern have been able to genetically change mice so their behavior is similar to some people with autism. The researchers hope their di

发表于:2019-01-13 / 阅读(147) / 评论(0) 分类 2006年VOA标准英语(五月)

Simulating Blindness Might Help Improve Hearing 模拟失明或有助于提高听力 A new report suggests it might be possible to change the circuitry of the brain to better process sound, a finding that could give renewed hope to the 350 million pe

发表于:2019-01-14 / 阅读(50) / 评论(0) 分类 VOA标准英语2014年(二月)

By Carol Pearson Washington, DC 19 January 2006 watch Dementia Exercise report Experts estimate that more than 24 million people worldwide suffer from dementia, a loss of mental functions including me

发表于:2019-01-26 / 阅读(159) / 评论(0) 分类 2006年VOA标准英语(一月)

Scientists Study Genetic Basis of Autism Scientists have taken another big step toward identifying the genetic flaws which may cause autism, a type of neurological development disorder. In the latest development, laboratory mice have been genetically

发表于:2019-01-31 / 阅读(74) / 评论(0) 分类 VOA标准英语2011年(十月)

By Greg Flakus San Antonio, Texas 13 October 2009 Dengue carrying mosquitos According to the World Health Organization, there are around 50 million cases of dengue fever around the world every year. About two and a half billion people, two fifths of

发表于:2019-02-09 / 阅读(65) / 评论(0) 分类 VOA标准英语2009年(十月)

By Jessica Berman Washington 19 December 2007 Stem cell research was the major medical and science story this past year, topping the list of achievements that experts say might finally lead to cures for many diseases. Meanwhile, global health officia

发表于:2019-02-17 / 阅读(101) / 评论(0) 分类 VOA常速英语2007年(十二月)