日期：2014-05-14 Stimulation of a certain population of neurons within the brain can alter the learning process, according to a team of neuroscientists and neurosurgeons at the University of Pennsylvania. A report in the Journal of Neuroscience describes for the fir... 阅读全文>>

日期：2014-05-14 Pregnancy is associated with a significant risk of a serious car crash requiring emergency medical care during the second trimester（中期妊娠） , according to a research paper published in CMAJ (Canadian Medical Association Journal). Traffic mishaps... 阅读全文>>

日期：2014-05-14 Fifty-million-year-old fossil beetles that fed only on palm seeds are giving Simon Fraser University biologists Bruce Archibald and Rolf Mathewes new information about ancient climates. According to their research, published online this week in The... 阅读全文>>

日期：2014-05-14 A study of Italians who consume a diet rich in resveratrol（白藜芦醇） -- the compound found in red wine, dark chocolate and berries -- finds they live no longer than and are just as likely to develop cardiovascular disease or cancer as those who ea... 阅读全文>>

日期：2014-05-14 Because of their far-flung（遥远的，广泛的） geography and colorful examples including the African ostrich（鸵鸟） , Australian emu, New Zealand kiwi and long lost giants such as the New Zealand moa, Baker, et. al. have examined a fascinating part i... 阅读全文>>

日期：2014-05-10 A genomic investigation by University of British Columbia researchers has revealed that a lethal parasite infecting a wide range of insects actually originated from pond scum（绿藻类层） , but has completely shed its green past on its evolutionary j... 阅读全文>>

日期：2014-05-10 Scientists showed that people who have a variant of a longevity gene, called KLOTHO, have improved brain skills such as thinking, learning and memory regardless of their age, sex, or whether they have a genetic risk factor for Alzheimer's disease. I... 阅读全文>>

日期：2014-05-10 It is springtime and they are everywhere: Newly enamored（迷恋的） couples walking through the city hand in hand, floating on cloud nine（九霄云上） . Yet a few weeks later the initial rush of romance will have dissolved and the world will not appea... 阅读全文>>

日期：2014-05-10 The largest metagenomic（元基因组的） search for antibiotic resistance genes in the DNA sequences of microbial communities from around the globe has found that bacteria carrying those vexing（令人烦恼的） genes turn up everywhere in nature that scie... 阅读全文>>

日期：2014-05-10 In recent years the cattle egret（黄头鹭） (Bubulcus ibis) has colonized American continent. Invasive species are a worldwide problem and studies are devoted to assess the damage they cause to local species populations. Thus, the process of coloniza... 阅读全文>>

日期：2014-05-10 Scientists have developed a new method for revealing how sea levels might rise around the world throughout the 21st century to address the controversial topic of whether the rate of sea level rise is currently increasing. The international team of r... 阅读全文>>

日期：2014-05-10 Scientists from the University of the Philippines, Los Baos have discovered a new plant species with an unusual lifestyle -- it eats nickel（镍） for a living -- accumulating up to 18,000 ppm of the metal in its leaves without itself being poisoned,... 阅读全文>>

日期：2014-05-10 Air and surface sampling techniques currently used by the US government are effective in fighting bioterrorism and potentially saving lives, a Saint Louis University researcher finds. Results published in Biosecurity and Bioterrorism by Alexander Ga... 阅读全文>>

日期：2014-05-10 Two widely used neonicotinoids（新烟碱） -- a class of insecticide -- appear to significantly harm honey bee colonies over the winter, particularly during colder winters, according to a new study from Harvard School of Public Health (HSPH). The stud... 阅读全文>>

日期：2014-05-09 Magnetic devices like hard drives, magnetic random access memories (MRAMs), molecular magnets, and quantum computers depend on the manipulation of magnetic properties. In an atom, magnetism arises from the spin and orbital momentum of its electrons.... 阅读全文>>

日期：2014-05-09 After cancer spreads, finding and destroying malignant（恶性的） cells that circulate in the body is usually critical to patient survival. Now, researchers reporting in the Cell Press journal Chemistry Biology have developed a new method that allows... 阅读全文>>

日期：2014-05-09 Flowers aren't just pretty to look at, they are how plants reproduce. In agricultural plants, the timing and regulation of flower formation has economic significance, affecting a crop's yield. A new paper by researchers at the University of Pennsylv... 阅读全文>>

日期：2014-05-09 What is the secret to aging more slowly and living longer? Not antioxidants, apparently. Many people believe that free radicals, the sometimes-toxic molecules produced by our bodies as we process oxygen, are the culprit behind aging. Yet a number of... 阅读全文>>

日期：2014-05-09 A comparison of the genomes of polar bears and brown bears reveals that the polar bear is a much younger species than previously believed, having diverged from brown bears less than 500,000 years ago. The analysis also uncovered several genes that m... 阅读全文>>

日期：2014-05-08 Theropod（兽脚亚目的） dinosaurs, a group which includes such famous species as Tyrannosaurus rex and Velociraptor, are often regarded as carnivorous and predatory animals, using their sharp teeth and claws to capture and dispatch prey. However, a d... 阅读全文>>