日期：2012-03-06 People and animals are not the only ones who can smell. Plants are also able to perceive odors（气味） , but they process them in a very different way . While insects or mammals smell odors within a second of exposure, plants require much longer exp... 阅读全文>>

日期：2012-03-06 Sawfishes wouldn't be sawfishes if they didn't come equipped with long toothy snouts（鼻子） -- their saws. Now, researchers reporting in the March 6 issue of Current Biology, a Cell Press publication, have figured out what they use those saws for,... 阅读全文>>

日期：2012-03-06 University of Utah engineers designed a new kind of video game controller that not only vibrates like existing devices, but pulls and stretches the thumb tips in different directions to simulate the tug of a fishing line, the recoil（畏缩，弹回） of... 阅读全文>>

日期：2012-03-06 As scientists continue the hunt for energy sources that are safer, cleaner alternatives to fossil fuel, an ever-increasing amount of valuable farmland is being used to produce bioethanol（生物乙醇） , a source of transportation fuel. And while land-... 阅读全文>>

日期：2012-03-06 Xinwei Wang had a hunch that（总感到，总怀疑） spider webs were worth a much closer look. So he ordered eight spiders -- Nephila clavipes, golden silk orbweavers -- and put them to work eating crickets and spinning webs in the cages he set up in an... 阅读全文>>

日期：2012-03-05 The exhaust fumes（废气） from gasoline vehicles contribute more to the production of a specific type of air pollution -- secondary organic aerosols (SOA) -- than those from diesel vehicles, according to a new study by scientists from the Cooperativ... 阅读全文>>

日期：2012-03-05 Freshwater ecosystems in northern regions are home to significantly more species of water fleas than traditionally thought, adding to evidence that regions with vanishing waters contain unique animal life. The new information on water fleas -- which... 阅读全文>>

日期：2012-03-05 Scientists from PRBO Conservation Science and the Department of Fish and Game have completed an innovative study on the effects of climate change on bird species of greatest concern. This first-of-its-kind study prioritizes which species are most at... 阅读全文>>

日期：2012-03-05 Researchers have discovered critical new details about the structure of a virus that causes potentially fatal brain swelling（肿胀） and paralysis in children, pointing toward designs for antiviral drugs to treat the disease. The virus, called enter... 阅读全文>>

日期：2012-03-05 Plant science is key to addressing the major challenges facing humanity in the 21st Century, according to Carnegie's David Ehrhardt and Wolf Frommer. In a Perspective published in The Plant Cell, the two researchers argue that the development of new... 阅读全文>>

日期：2012-03-05 A Washington State University researcher has demonstrated that a variety of environmental toxicants can have negative effects on not just an exposed animal but the next three generations of its offspring. The animal's DNA sequence remains unchanged,... 阅读全文>>

日期：2012-03-05 A group of Italian and Swedish researchers appears to have solved the problem of radio congestion（拥挤） by cleverly twisting radio waves into the shape of fusilli（意大利螺旋面） pasta, allowing a potentially infinite number of channels to be broa... 阅读全文>>

日期：2012-03-05 A new power scheme for cardiac（心脏的） pacemakers turns to an unlikely source: vibrations from heartbeats themselves. Engineering researchers at the University of Michigan designed a device that harvests energy from the reverberation（混响，反射）... 阅读全文>>

日期：2012-03-05 Emotion-sensing computer software that models and responds to students' cognitive and emotional states -- including frustration and boredom -- has been developed by University of Notre Dame Assistant Professor of Psychology Sidney D'Mello, Art Graes... 阅读全文>>

日期：2012-03-02 Research at the University of Liverpool, using computer models to reconstruct the jaw muscle of Tyrannosaurus rex, has suggested that the dinosaur had the most powerful bite of any living or extinct terrestrial（陆地的） animal. The team artificiall... 阅读全文>>

日期：2012-03-02 What if bacteria could talk to each other? What if they had a sense of touch? A new study by researchers at UC Santa Barbara suggests both, and theorizes that such cells may, in fact, need to communicate in order to perform certain functions. The fi... 阅读全文>>

日期：2012-03-02 In a paper just published in the journal Cell, a team from the University of North Carolina at Chapel Hill has explained for the first time how a long-studied protein complex affects cell migration and how external cues affect cell's ability to migr... 阅读全文>>

日期：2012-03-02 Ground-breaking research by an international team of scientists will help to make one of the most versatile（通用的） of bacteria even more useful to society and the environment. Though it lives naturally in the soil, the bacterium Bacillus subtilis... 阅读全文>>

日期：2012-03-02 The world's oceans may be turning acidic faster today from human carbon emissions than they did during four major extinctions in the last 300 million years, when natural pulses of carbon sent global temperatures soaring, says a new study in Science.... 阅读全文>>

日期：2012-03-01 Rising sea levels are likely to change Southern California beaches in the coming century, but not in ways you might expect. While some beaches may shrink or possibly disappear, others are poised to remain relatively large -- leaving an uneven distri... 阅读全文>>