日期：2014-11-12 Research scientists at VTT Technical Research Centre of Finland have demonstrated a new technique for generating electrical energy. The new method can be used in harvesting energy from mechanical vibrations of the environment and converting it into... 阅读全文>>

日期：2014-11-12 The effects of chronic marijuana use on the brain may depend on age of first use and duration of use, according to researchers at the Center for BrainHealth at The University of Texas at Dallas. In a paper published today in Proceedings of the Natio... 阅读全文>>

日期：2014-11-12 Physicists have, for the first time, explored in detail the time evolution of the conductivity, as well as other quantum-level electron transport characteristics, of a graphene device subjected to periodic ultra-short pulses. To date, the majority o... 阅读全文>>

日期：2014-11-12 Laundry detergent pods began appearing on U.S. store shelves in early 2012, and people have used them in growing numbers ever since. The small packets can be tossed into a washing machine without ever having to measure out a liquid or powder. The co... 阅读全文>>

日期：2014-11-12 The remains of two Ice Age infants, buried more than 11,000 years ago at a site in Alaska, represent the youngest human remains ever found in northern North America, according to a new paper published in the Proceedings of the National Academy of Sc... 阅读全文>>

日期：2014-11-10 Sometimes, words just complicate things. What if our brains could communicate directly with each other, bypassing the need for language? University of Washington researchers have successfully replicated a direct brain-to-brain connection between pai... 阅读全文>>

日期：2014-11-10 Earth's ancient oceans held much lower concentrations of sulfate -- a key biological nutrient -- than previously recognized, according to research published this week in Science. The findings paint a new portrait of our planet's early biosphere and... 阅读全文>>

日期：2014-11-10 North Carolina State University researchers have developed technology that allows cyborg cockroaches, or biobots, to pick up sounds with small microphones and seek out the source of the sound. The technology is designed to help emergency personnel f... 阅读全文>>

日期：2014-11-10 Speed is an asset for a predator. Except when that predator runs so fast that it essentially blinds itself. The tiger beetle, relative to its size, is the fastest creature on Earth. Some of these half-inch-long beetles cover about 120 body lengths p... 阅读全文>>

日期：2014-11-10 Fast, on-the-spot tests for bacterial infections may help to reduce excessive antibiotic use. A systematic review published in The Cochrane Library, found that when doctors tested for the presence of bacterial infections they prescribed fewer antibi... 阅读全文>>

日期：2014-11-10 The seemingly simple process of phase changes -- those transitions between states of matter -- is more complex than previously known, according to research based at Princeton University, Peking University and New York University. Their study, which... 阅读全文>>

日期：2014-11-10 For much the same reason LCD televisions offer eye-popping performance, a thermomagnetic processing method developed at the Department of Energy's Oak Ridge National Laboratory can advance the performance of polymers. Polymers are used in cars, plan... 阅读全文>>

日期：2014-11-10 The dodo is among the most famous extinct creatures, and a poster child for human-caused extinction events. Despite its notoriety, and the fact that the species was alive during recorded human history, little is actually known about how this animal... 阅读全文>>

日期：2014-11-10 Many large charismatic mammals went extinct at the end of the Ice Age (approx 11,000 years ago), including the Steppe bison, Bison priscus. A recent find in Eastern Siberia has uncovered one of these bison, literally, frozen in time. The most comple... 阅读全文>>

日期：2014-11-10 An international team of more than 100 researchers--including Dr. Michelle Trautwein of the California Academy of Sciences--has published the first modern roadmap of insect evolution. Understanding how insects are related uncovers their true ecologi... 阅读全文>>

日期：2014-11-10 Sweating, panting, moving to the shade, or taking a dip are all time-honored methods used by animals to cool down. The implicit goal of these adaptations is always to keep the brain from overheating. Now a new study shows that armor-plated dinosaurs... 阅读全文>>

日期：2014-11-06 The microbes living in people's guts are much less diverse than those in humans' closest relatives, the African apes, an apparently long evolutionary trend that appears to be speeding up in more modern societies, with possible implications for human... 阅读全文>>

日期：2014-11-06 Consumers often complain that alcohol-free beer is tasteless, but some of the aromas it is lacking can be carried across from regular beer. Researchers from the University of Valladolid (Spain) have developed the technique and a panel of tasters has... 阅读全文>>

日期：2014-11-06 Among patients with metastatic melanoma, treatment with a combination of the drugs sargramostim plus ipilimumab, compared with ipilimumab alone, resulted in longer overall survival and lower toxicity, but no difference in progression-free survival,... 阅读全文>>

日期：2014-11-06 In an era of reduced funding, it's not enough for a young researcher to be a good scientist. He or she also needs street smarts to, for example, find an influential mentor, dress professionally, network during scientific meetings and be able to desc... 阅读全文>>