日期：2014-12-23 Many genetic mutations in visual pigments, spread over millions of years, were required for humans to evolve from a primitive mammal with a dim, shadowy view of the world into a greater ape able to see all the colors in a rainbow. Now, after more th... 阅读全文>>

日期：2014-12-23 About 15 percent of women in the United States suffer from anxiety disorders and depression during their pregnancies, and many are prescribed antidepressants. However little is known about how early exposure to these medications might affect their o... 阅读全文>>

日期：2014-12-23 Cuprates are materials with great promise for achieving superconductivity at higher temperatures (-120oC). This could mean low-cost electricity without energy loss. Intense research has focused on understanding the physics of cuprates in the hope th... 阅读全文>>

日期：2014-12-23 Here's a nice surprise: quantum physics is less complicated than we thought. An international team of researchers has proved that two peculiar features of the quantum world previously considered distinct are different manifestations of the same thin... 阅读全文>>

日期：2014-12-23 Here's a nice surprise: quantum physics is less complicated than we thought. An international team of researchers has proved that two peculiar features of the quantum world previously considered distinct are different manifestations of the same thin... 阅读全文>>

日期：2014-12-22 People who own all-electric cars where coal generates the power may think they are helping the environment. 电动汽车的用电来自燃煤发电厂，使用电动汽车的人可能认为他们保护了环境。 But a new study finds their vehicles actually make the air dirtier, wo... 阅读全文>>

日期：2014-12-19 The longer people spend preparing meals, the worse their health becomes, a study found. 一项研究表明：烹调的时间越长，身体就越不健康。 The result contradicts the popular public health message that it is better to cook from scratch than rely on ready... 阅读全文>>

日期：2014-12-18 The 2013 Rim Fire, the largest wildland fire ever recorded in the Sierra Nevada region, is still fresh in the minds of Californians, as is the urgent need to bring forests back to a more resilient condition. Land managers are using fire as a tool to... 阅读全文>>

日期：2014-12-18 A network of nine reference sites off the Australian coast is providing the latest physical, chemical, and biological information to help scientists better understand Australia's coastal seas, according to a study published December 17, 2014 in the... 阅读全文>>

日期：2014-12-18 A Yale University lab has crafted the first synthetic molecules that have both the targeting and response functions of antibodies. The new molecules -- synthetic antibody mimics (SyAMs) -- attach themselves simultaneously to disease cells and diseas... 阅读全文>>

日期：2014-12-18 It takes some cooking, but turning farm waste into biofuels is now possible and makes economic sense, according to preliminary research from the University of Guelph. Guelph researchers are studying how to make biofuels from farm waste, especially w... 阅读全文>>

日期：2014-12-18 NASA satellite instruments have observed a marked increase in solar radiation absorbed in the Arctic since the year 2000 -- a trend that aligns with the steady decrease in Arctic sea ice during the same period. While sea ice is mostly white and refl... 阅读全文>>

日期：2014-12-18 A team of scientists, led by the University of Toronto's Barbara Sherwood Lollar, has mapped the location of hydrogen-rich waters found trapped kilometres beneath Earth's surface in rock fractures in Canada, South Africa and Scandinavia. Common in P... 阅读全文>>

日期：2014-12-17 To feed the world's growing population--expected to reach nine billion by the year 2050--we will have to find ways to produce more food on less farmland, without causing additional harm to the remaining natural habitat. A feature review, to be publi... 阅读全文>>

日期：2014-12-17 Antimicrobial peptides are a distinctive class of potent, broad-spectrum antibiotics produced by the body's innate immune system -- the first line of defense against disease-causing microbes. In a new study, Yixin Shi, Ph.D., and Wei Kong, Ph.D., re... 阅读全文>>

日期：2014-12-17 Although currently available diagnostic screening systems for breast cancer like X-ray computed tomography (CT) and mammography are effective at detecting early signs of tumors, they are far from perfect, subjecting patients to ionizing radiation an... 阅读全文>>

日期：2014-12-17 Ancient DNA extracted from the bones and teeth of giant lemurs that lived thousands of years ago in Madagascar may help explain why the giant lemurs went extinct. It also explains what factors make some surviving species more at risk today, says a s... 阅读全文>>

日期：2014-12-17 More than half of all American children will likely live with an unmarried mother at some point before they reach age 18, according to a report issued by Princeton University and Harvard University. The absence of a biological father increases the l... 阅读全文>>

日期：2014-12-17 The team responsible for the Sample Analysis at Mars (SAM) instrument suite on NASA's Curiosity rover has made the first definitive detection of organic molecules at Mars. Organic molecules are the building blocks of all known forms of terrestrial l... 阅读全文>>

日期：2014-12-17 Gay people really do have an inbuilt radar that helps them seek out like-minded souls, scientists have shown. 科学家表示，同性恋人群的确有一个类似内置雷达的感应体系能帮他们搜寻到同类。 This sixth sense, or 'gaydar', ensures they pay more attention t... 阅读全文>>