日期：2011-03-06 Dr. David Levin, Professor of Molecular Cell Biology at Boston University Henry M. Goldman School of Dental Medicine and Professor of Microbiology at Boston University School of Medicine discovered recently a novel, evolutionarily conserved mechanis... 阅读全文>>

日期：2011-03-06 ESA's Mars Express has returned new images of an elongated（细长的） impact crater in the southern hemisphere of Mars. Located just south of the Huygens basin, it could have been carved out by a train of projectiles striking the planet at a shallow... 阅读全文>>

日期：2011-03-04 Low physical activity increases kidney transplant patients' likelihood（可能） of dying early, according to a study appearing in an upcoming issue of the Clinical Journal of the American Society Nephrology (CJASN). The results suggest that patients... 阅读全文>>

日期：2011-03-04 As carbon dioxide levels have risen during the last 150 years, the density of pores（气孔） that allow plants to breathe has dwindled by 34 percent, restricting the amount of water vapor（水蒸气） the plants release to the atmosphere, report scienti... 阅读全文>>

日期：2011-03-04 The long-time practice of using police facial sketches to nab（捉住，逮捕） criminals has been, at best, an inexact art. But the process may soon be a little more exact thanks to the work of some Michigan State University researchers. A team led by... 阅读全文>>

日期：2011-03-04 A new paper by University of Calgary researchers, published today in PLoS ONE, demonstrates the edge given to prey in the space race by human activity. The research was conducted by two University of Calgary students, a University of Calgary Post-Do... 阅读全文>>

日期：2011-03-04 Fossil records verify a long-standing theory that horses evolved through natural selection, according to groundbreaking research by two anatomy（解剖学） professors at New York College of Osteopathic Medicine (NYCOM) of New York Institute of Technol... 阅读全文>>

日期：2011-03-04 Researchers at the Johns Hopkins School of Medicine have discovered that a natural product isolated from a traditional Chinese medicinal plant commonly known as thunder god vine（雷公藤） , or lei gong teng, and used for hundreds of years to treat m... 阅读全文>>

日期：2011-03-02 Methane（甲烷） is an extremely potent（有效的） greenhouse gas. Wetlands, gas hydrates, permafrost（永久冻土） , termites（白蚁类） , oceans, freshwater bodies, non-wetland soils, are all natural sources of atmospheric methane; however, the majorit... 阅读全文>>

日期：2011-03-02 Pioneering technology by scientists at Queen's University Belfast, which is transforming the lives of millions of people in Asia, is now being used to create safer drinking water in the United States. The award-winning system Subterranean Arsenic Re... 阅读全文>>

日期：2011-03-02 Postmenopausal women who smoke or used to smoke have up to a 16% higher risk of developing breast cancer compared to women who have never smoked, finds research published on bmj.com today. The study also says that women who have had extensive exposu... 阅读全文>>

日期：2011-03-01 Ever get a flu shot and still get the flu? If so, there's new hope for flu-free winters in the years to come thanks to a new discovery by researchers who found that a drug called DMXAA, originally developed as anti-tumor agent, enhances the ability... 阅读全文>>

日期：2011-03-01 There's an old saying that if you don't like the weather in New Mexico, wait five minutes. Maybe it should be amended to 10,000 years, according to new research. In a letter published recently in the journal Nature, Los Alamos National Laboratory re... 阅读全文>>

日期：2011-03-01 When your brain encounters sensory stimuli, such as the scent of your morning coffee or the sound of a honking car, that input gets shuttled to the appropriate brain region for analysis. The coffee aroma（芳香） goes to the olfactory（嗅觉的） corte... 阅读全文>>

日期：2011-03-01 In the mating game, some female mites（螨虫类） are mightier than their mates, new research at the University of Michigan and the Russian Academy of Sciences suggests. The evidence comes, in part, from 40 million-year-old mating mites preserved in B... 阅读全文>>

日期：2011-02-28 In a promising science-fiction-meets-real-world juxtaposition（并列，毗邻） , researchers at UT Southwestern Medical Center have discovered that the mammalian（哺乳动物的） newborn heart can heal itself completely. Researchers, working with mice, fo... 阅读全文>>

日期：2011-02-28 A team of scientists led by John Badding, a professor of chemistry at Penn State University, has developed the very first optical fiber made with a core of zinc selenide（硒醚，硒化物） -- a light-yellow compound that can be used as a semiconductor.... 阅读全文>>

日期：2011-02-28 The number of connections between nerve cells in the brain can be regulated by an immune system molecule, according to a new study from UC Davis. The research, published Feb. 27 in the journal Nature Neuroscience, reveals a potential link between im... 阅读全文>>

日期：2011-02-26 Nearly 16 million Americans will be diagnosed with Alzheimer's disease or another type of dementia（痴呆） by 2050, according to the Alzheimer's Association. Symptoms（症状） include mood and behavior changes, disorientation（迷失方向） , memory los... 阅读全文>>

日期：2011-02-25 Scientists at Harvard University are moving closer to answering some age-old questions. How did the leopard get its spots? How did the zebra get its stripes? The answer may be a gene called Agouti, which the Harvard team has found governs color patt... 阅读全文>>