日期：2012-03-29 A report from the nation's leading cancer organizations shows rates of death in the United States from all cancers for men and women continued to decline between 2004 and 2008. The findings come from the latest Annual Report to the Nation on the Sta... 阅读全文>>

日期：2012-03-29 A team of scientists has announced the discovery of a 3.4 million-year-old partial foot from the Woranso-Mille area of the Afar region of Ethiopia. The fossil foot did not belong to a member of Lucy's species, Australopithecus afarensis, the famous... 阅读全文>>

日期：2012-03-28 Helping bridge the gap between photonics（光电） and electronics, researchers from Purdue University have coaxed a thin film of titanium nitride（氮化物） into transporting plasmons, tiny electron excitations coupled to light that can direct and man... 阅读全文>>

日期：2012-03-28 Ecologists in New Zealand have shown for the first time that Marine Protected Areas -- long advocated as a way of protecting threatened marine mammals -- actually work. Their study, based on 21 years' monitoring and published March 27 in the British... 阅读全文>>

日期：2012-03-28 Common material such as polyethylene（聚乙烯） used in plastic bags could be turned into something far more valuable through a process being developed at the Department of Energy's Oak Ridge National Laboratory. In a paper published in Advanced Mate... 阅读全文>>

日期：2012-03-28 Use of a patient's bone marrow cells for treating chronic ischemic（缺血性的） heart failure did not result in improvement on most measures of heart function, according to a study appearing in JAMA. The study is being published early online to coinc... 阅读全文>>

日期：2012-03-27 The huge changes in Earth's crust that influenced human evolution are being redefined, according to research published March 26 in Nature Geoscience. The Great Rift Valley of East Africa -- the birthplace of the human species -- may have taken much... 阅读全文>>

日期：2012-03-27 Western Europe has long been held to be the cradle of Neandertal evolution since many of the earliest discoveries were from sites in this region. But when Neandertals started disappearing around 30,000 years ago, anthropologists（人类学家） figured... 阅读全文>>

日期：2012-03-27 Identity confusion between a new, yet unnamed shark species, originally discovered off the eastern United States by Nova Southeastern University Oceanographic Center (NSU-OC) researchers, and its look-alike cousin -- the endangered scalloped（扇形的... 阅读全文>>

日期：2012-03-27 Compelling（引人注目的） evidence of the impact of the Deepwater Horizon oil spill on deep-sea corals will be published online in the Early Edition of the journal Proceedings of the National Academy of Sciences during the week beginning March 26. Th... 阅读全文>>

日期：2012-03-26 Most of us walk and carry items in our hands every day. These are seemingly simple activities that the majority of us don't question. But an international team of researchers, including Brian Richmond at the George Washington University, have discov... 阅读全文>>

日期：2012-03-26 The past decade has been one of unprecedented weather extremes. Scientists of the Potsdam Institute for Climate Impact Research (PIK) in Germany argue that the high incidence of extremes is not merely accidental. From the many single events a patter... 阅读全文>>

日期：2012-03-26 Seven years ago, astronomers boggled when they found the first runaway star flying out of our galaxy at a speed of 1.5 million miles per hour. The discovery intrigued theorists, who wondered: If a star can get tossed outward at such an extreme veloc... 阅读全文>>

日期：2012-03-23 Alzheimer's disease and other forms of dementia（痴呆） may spread within nerve networks in the brain by moving directly between connected neurons, instead of in other ways proposed by scientists, such as by propagating in all directions, according... 阅读全文>>

日期：2012-03-23 Universitat Autonoma de Barcelona researchers, in collaboration with an experimental group from the Academy of Sciences of Slovakia, have created a cylinder which hides contents and makes them invisible to magnetic fields. The device was built using... 阅读全文>>

日期：2012-03-23 The percentage of electronic waste occupying our landfills has grown at an alarming rate over the last decade, giving rise to concerns about the toxicity of components used in consumer electronics. Researchers at the University of Florida are lookin... 阅读全文>>

日期：2012-03-23 Last month, Doug Wiens, PhD, professor of earth and planetary science at Washington University in St. Louis, and two WUSTL students were cruising the tropical waters of the western Pacific above the Mariana trench aboard the research vessel Thomas G... 阅读全文>>

日期：2012-03-23 Scientists have long speculated about why there is a large change in the strength of rocks that lie at the boundary between two layers immediately under Earth's crust: the lithosphere（岩石圈） and underlying asthenosphere. Understanding this bounda... 阅读全文>>

日期：2012-03-23 Tapping out a beat may help children learn difficult fraction concepts, according to new findings due to be published in the journal Educational Studies in Mathematics. An innovative curriculum uses rhythm to teach fractions at a California school w... 阅读全文>>

日期：2012-03-23 An odd, previously unseen landform could provide a window into the geological history of Mars, according to new research by University of Washington geologists. They call the structures periodic bedrock ridges. The ridges look like sand dunes（沙丘... 阅读全文>>