日期：2010-11-12 People spend 46.9 percent of their waking hours thinking about something other than what they're doing, and this mind-wandering typically makes them unhappy. So says a study that used an iPhone web app to gather 250,000 data points on subjects' thou... 阅读全文>>

日期：2010-11-11 New research released today takes a look at birth outcomes and maternal（母亲的） smoking, building urgency for more states and cities to join the nationwide smoke-free trend that has accelerated in recent years. According to the new data, strong sm... 阅读全文>>

日期：2010-11-11 Peace is the curious name given to a pair of interacting and merging galaxies that lie around 220 million light-years away in the constellation（星座，荟萃） of Aquarius. It is also known as NGC 7252 and Arp 226 and is just bright enough to be seen... 阅读全文>>

日期：2010-11-11 Conversion of sorghum（高粱） grass to ethanol（乙醇，酒精） has increased with the interest in renewable fuel sources. Researchers at Iowa State University examined 12 varieties of sorghum grass grown in single and double cropping systems. The expe... 阅读全文>>

日期：2010-11-11 Whales exhibit skin damage consistent with（符合） acute sunburn in humans, and it seems to be getting worse over time, reveals research published this week in Proceedings of the Royal Society B. Scientists from the Zoological Society of London (ZSL... 阅读全文>>

日期：2010-11-10 Hormones, growth factors and several proteins ensure that development occurs in the right way, at the right time. The components that cause breast development in mammals, for example, were thought to be largely known. However, as a team of scientist... 阅读全文>>

日期：2010-11-10 Some scholars estimate that presenteeism（出勤） , a relatively recent buzzword（流行词） that applies to people who are less productive at work because of health issues, costs employers as much as three times the dollar amount as absenteeism（旷工... 阅读全文>>

日期：2010-11-10 At the current pace of research and development, global oil will run out 90 years before replacement technologies are ready, says a new University of California, Davis, study based on stock market expectations. The forecast was published online Mond... 阅读全文>>

日期：2010-11-10 Researchers at the University of Maryland have proposed a scheme for detecting a concealed source of radioactive material without searching containers（容器） one by one. Detection of radioactive material concealed in shipping containers is importan... 阅读全文>>

日期：2010-11-10 A team of international researchers led by ancient DNA experts from the University of Adelaide has resolved the longstanding issue of the origins of the people who introduced farming to Europe some 8000 years ago. A detailed genetic study of one of... 阅读全文>>

日期：2010-11-10 The amount of time parents spend talking about numbers has a much bigger impact on how young children learn mathematics than was previously known, researchers at the University of Chicago have found. For example, children whose parents talked more a... 阅读全文>>

日期：2010-11-10 NASA's Fermi Gamma-ray Space Telescope has unveiled a previously unseen structure centered in the Milky Way -- a finding likened in terms of scale to the discovery of a new continent on Earth. The feature, which spans 50,000 light-years, may be the... 阅读全文>>

日期：2010-11-08 Lupus（狼疮，天狼座） puts children at higher risk for coronary artery disease（冠心病） when they become adults, but routinely using statins（他汀类药物） doesn't provide enough benefit to warrant their regular use in children and adolescents, acco... 阅读全文>>

日期：2010-11-08 In the largest study to date of the Arthritis（关节炎） Foundation's Tai Chi program, participants showed improvement in pain, fatigue（疲劳，疲乏） , stiffness and sense of well-being. Their ability to reach while maintaining balance also improved,... 阅读全文>>

日期：2010-11-08 New research from Georgetown University Medical Center (GUMC) suggests that up to 40 percent of scleroderma（硬皮病） patients will not be correctly diagnosed with the disorder using a new automated commercial screening test. The findings of the stu... 阅读全文>>

日期：2010-11-08 In an important breakthrough, scientists at McMaster University have discovered how to make human blood from adult human skin. The discovery, published in the prestigious（有名望的） science journal Nature today, could mean that in the foreseeable（... 阅读全文>>

日期：2010-11-07 United States and Japanese researchers have identified a key step in metabolic pathways（代谢途径） linked to diabetes and cancer. The study on activation of the protein complex TORC 2 was published online in the journal Current Biology Oct. 28. TOR... 阅读全文>>

日期：2010-11-07 From apocalyptic（启示录的） forecasting to estimates of mass extinctions, climate change is a topic which is filled with fearful predictions for the future. In his latest research, published in WIREs Climate Change, historian Matthias Drries examin... 阅读全文>>

日期：2010-11-07 As the Arctic warms, a new cache of resourcessnow goose eggsmay help sustain（维持，支撑） the polar bear population for the foreseeable（可预知的） future. In a new study published in an early online edition of Oikos, researchers affiliated with th... 阅读全文>>

日期：2010-11-07 Most mutations（突变，变化） in the genes of the Salmonella bacterium（沙门氏菌） have a surprisingly small negative impact on bacterial fitness. And this is the case regardless whether they lead to changes in the bacterial proteins or not. This is... 阅读全文>>