日期：2014-08-06 A special section of the September issue of Forest Ecology and Management, available online now, assesses the interactions among fire, climate change, and forests for five major regions of the United States. The editors of the section -- Drs. Chelcy... 阅读全文>>

日期：2014-08-06 While diabetes rates are on the rise and are having serious effects on millions of people's health, researchers studying grizzly bears（灰熊） have now discovered a natural state of diabetes that serves a real biological purpose and is also reversib... 阅读全文>>

日期：2014-08-06 Spider silk is an impressive material; lightweight and stretchy yet stronger than steel. But the challenge that spiders face to produce this substance is even more formidable（强大的） . Silk proteins, called spidroins, must convert from a soluble f... 阅读全文>>

日期：2014-08-06 Scientists have developed and validated a new method to identify which people are narcissistic（自恋的） : just ask them. In a series of 11 experiments involving more than 2,200 people of all ages, the researchers found they could reliably identify... 阅读全文>>

日期：2014-08-05 Every once in a while, we are forced to sort that stack of papers on the kitchen counter. Interspersed（点缀，散布） between the expired coupons and dozens of takeout menus are important documents like your car insurance or electric bill. So it isn'... 阅读全文>>

日期：2014-08-05 Horses are sensitive to the facial expressions and attention of other horses, including the direction of the eyes and ears. The findings, reported in the Cell Press journal Current Biology on August 4, are a reminder for us humans to look beyond our... 阅读全文>>

日期：2014-08-05 Eating less meat would protect water resources in dry areas around the world, researchers at Aalto University have found. Reducing the use of animal products can have a considerable impact on areas suffering scarce water resources, as meat productio... 阅读全文>>

日期：2014-08-05 Crafty（狡猾的） parasites frequently undergo dramatic shape changes during their life cycles that enable them to adapt to different living conditions and thrive. But these transformations might not be as difficult as they appear, according to a stu... 阅读全文>>

日期：2014-08-05 It's easy to guess why it doesn't take long to learn to avoid certain behaviors and embrace others. But how do we know what drives these predilections（偏爱，嗜好） ? A study led by Aimee Dunlap at the University of Missouri-St. Louis, and co-author... 阅读全文>>

日期：2014-08-04 A blood test that can predict whether someone may attempt suicide has been developed by scientists in a breakthrough which could prevent hundreds of deaths. 研究人员取得科研突破，通过验血来预测人们是否具有自杀倾向，从而防止众多悲剧发生。 American re... 阅读全文>>

日期：2014-08-04 Graphene, an ultrathin form of carbon with exceptional electrical, optical, and mechanical properties, has become a focus of research on a variety of potential uses. Now researchers at MIT have found a way to control how the material conducts electr... 阅读全文>>

日期：2014-08-04 Having a companion in old age is good for people -- and, it turns out, might extend the chance for life on certain Earth-sized planets in the cosmos as well. Planets cool as they age. Over time their molten cores solidify and inner heat-generating a... 阅读全文>>

日期：2014-08-04 A new study involving scientists from the University of Southampton has revealed how massive, meat-eating, ground-dwelling dinosaurs evolved into agile（敏捷的） flying birds: they just kept shrinking and shrinking, for over 50 million years. Today,... 阅读全文>>

日期：2014-08-04 A little over a decade ago, prestin（膜动力蛋白） was found to be a key gene responsible for hearing in mammals. Prestin makes a protein found in the hair cells of the inner ear that contracts and expands rapidly to transmit signals that help the co... 阅读全文>>

日期：2014-08-04 During the winter of 1944, the Nazis blocked food supplies to the western Netherlands, creating a period of widespread famine（饥荒） and devastation. The impact of starvation on expectant mothers produced one of the first known epigenetic（后生的）... 阅读全文>>

日期：2014-08-04 In the United States, natural-gas production from shale rock（页岩） has increased by more than 700 percent since 2007. Yet scientists still do not fully understand the industry's effects on nature and wildlife, according to a report in the journal... 阅读全文>>

日期：2014-08-04 Sieve elements are a key component of phloem（筛部，韧皮部） , the conductive tissue through which plants transport carbohydrates and a wide range of signalling molecules. Elongated cylindrical cells are capped at one end by a sieve plate and arrang... 阅读全文>>

日期：2014-08-04 Scientists have recently gathered some of the strongest evidence to date to explain what makes the sun's outer atmosphere so much hotter than its surface. The new observations of the small-scale extremely hot temperatures are consistent with only on... 阅读全文>>

日期：2014-07-31 Earth and Mercury are both rocky planets with iron cores, but Mercury's interior differs from Earth's in a way that explains why the planet has such a bizarre（奇异的） magnetic field, UCLA planetary physicists and colleagues report. Measurements fr... 阅读全文>>

日期：2014-07-31 Exotic pests, shrinking ranges and a changing climate threaten some of the world's most rare and ecologically important plants, and so conservationists establish seed collections to save the seeds in banks or botanical gardens（植物园） in hopes of... 阅读全文>>