日期：2011-08-28 An analysis of more than 1,000 research articles concluded that few health problems are caused by or clearly associated with vaccines. A committee of experts convened by the Institute of Medicine to review the scientific literature on possible adver... 阅读全文>>

日期：2011-08-28 A caesium（铯） fountain clock that keeps the United Kingdom's atomic time is now the most accurate long-term timekeeper in the world, according to a new evaluation of the clock that will be published in the October 2011 issue of the international s... 阅读全文>>

日期：2011-08-26 Globally, irrigation increases agricultural productivity by an amount roughly equivalent to the entire agricultural output of the U.S., according to a new University of Wisconsin-Madison study. That adds up to a sizeable impact on carbon uptake from... 阅读全文>>

日期：2011-08-26 Believe it or not, one thing that predicts how well a CEO's company performs is -- the width of the CEO's face! CEOs with wider faces have better-performing companies than CEOs with long faces. That's the conclusion of a new study which will be publ... 阅读全文>>

日期：2011-08-26 Canadian researchers have discovered that a tumor cell marker is a receptor for measles（麻疹） virus, suggesting the possible use of measles virus to help fight cancer. Their findings appear in the Open Access journal PLoS Pathogens. Viruses cause... 阅读全文>>

日期：2011-08-26 Here's one way that old-fashioned newsprint beats the Internet. Tulane University scientists have discovered a novel bacterial strain, dubbed TU-103, that can use paper to produce butanol（丁醇） , a biofuel that can serve as a substitute for gasoli... 阅读全文>>

日期：2011-08-25 In the zeal（热情，热心） to eliminate dangerous bacteria, it is possible that we are also permanently killing off beneficial bacteria as well, posits（假定） Martin Blaser, MD, Frederick H. King Professor of Medicine, professor of Microbiology and... 阅读全文>>

日期：2011-08-25 Coriander（芫荽） oil has been shown to be toxic to a broad range of harmful bacteria. Its use in foods and in clinical agents could prevent food-borne illnesses and even treat antibiotic-resistant infections, according to the authors of a study pub... 阅读全文>>

日期：2011-08-25 Bone marrow transplantation with genetically modified cells may prolong the period of cancer-free survival, suggests a study led by Dr. Vivek Rangnekar, associate director of translational research for the Markey Cancer Center at the University of K... 阅读全文>>

日期：2011-08-25 In the first study of its kind, researchers have linked a natural global climate cycle to periodic（周期的） increases in warfare. The arrival of El Nio, which every three to seven years boosts temperatures and cuts rainfall, doubles the risk of civ... 阅读全文>>

日期：2011-08-24 In the Mid-South, twin-row soybean production is becoming a popular growing technique for soybean producers. An estimated 80% of the total hectares（公顷） grown in the Mississippi Delta are planted in this configuration. While growers report this m... 阅读全文>>

日期：2011-08-24 Baylor University environmental researchers have proposed in a new study a different approach to predict the environmental safety of chemicals by using data from other similar chemicals. For many chemicals in use every day, scientists do not have en... 阅读全文>>

日期：2011-08-24 Researchers at the National High Magnetic Field Laboratory's Pulsed Field Facility at Los Alamos National Laboratory have set a new world record for the strongest magnetic field produced by a nondestructive magnet. The scientists achieved a field of... 阅读全文>>

日期：2011-08-24 Eight million, seven hundred thousand species (give or take 1.3 million). That is a new, estimated total number of species on Earth -- the most precise calculation ever offered -- with 6.5 million species found on land and 2.2 million (about 25 perc... 阅读全文>>

日期：2011-08-23 Astronomers at the California Institute of Technology (Caltech) have discovered that the dwarf planet 2007 OR10 -- nicknamed Snow White -- is an icy world, with about half its surface covered in water ice that once flowed from ancient, slush-spewing... 阅读全文>>

日期：2011-08-23 A new University of Colorado Boulder study indicates a major climate oscillation（振荡） in the Southern Hemisphere that is expected to intensify in the coming decades will likely cause increased wildfire activity in the southern half of South Ameri... 阅读全文>>

日期：2011-08-23 Patients suffering from an aggressive brain cancer will benefit from the results of a University of Illinois study that could advance the development of targeted gene therapies and improve prognosis. We have advanced the understanding of the role of... 阅读全文>>

日期：2011-08-23 If so many poor people live around national parks in developing countries, does that mean that these parks are contributing to their poverty? Yes, according to the conventional wisdom, but no, according to a 10-year study of people living around Kib... 阅读全文>>

日期：2011-08-20 When it comes to mental illness, the sexes are different: Women are more likely to be diagnosed with anxiety or depression, while men tend toward substance abuse or antisocial disorders, according to a new study published by the American Psychologic... 阅读全文>>

日期：2011-08-20 As biodiversity declines worldwide, there is concern that this will lead to declines in the services that ecosystems provide for people, such as food production, carbon storage, and water purification. But until now it has been unclear, whether just... 阅读全文>>