日期：2012-08-29 An international team of scientists has discovered the oldest record of arthropods（节肢动物） -- invertebrate（无脊椎的） animals that include insects, arachnids, and crustaceans -- preserved in amber（琥珀） . The specimens, one fly and two mites... 阅读全文>>

日期：2012-08-29 Pity the male of the marine whelk（峨螺） , Solenosteira macrospira. He does all the work of raising the young, from egg-laying to hatching -- even though few of the baby snails are his own. The surprising new finding by researchers at the Universit... 阅读全文>>

日期：2012-08-28 With the help of beneficial bacteria, plants can slam the door when disease pathogens come knocking, University of Delaware researchers have discovered. A scientific team under the leadership of Harsh Bais, assistant professor of plant and soil scie... 阅读全文>>

日期：2012-08-28 Previous estimates about the total mass of all life on our planet have to be reduced by about one third. This is the result of a study by a German-U.S. science team published in the current online issue of Proceedings of the National Academy of Scie... 阅读全文>>

日期：2012-08-28 Refrigerating coal-plant emissions would reduce levels of dangerous chemicals that pour into the air -- including carbon dioxide by more than 90 percent -- at a cost of 25 percent efficiency, according to a simple math-driven formula designed by a t... 阅读全文>>

日期：2012-08-28 The extent of the sea ice covering the Arctic Ocean has shrunk. According to scientists from NASA and the NASA-supported National Snow and Ice Data Center (NSIDC) in Boulder, Colo., the amount is the smallest size ever observed in the three decades... 阅读全文>>

日期：2012-08-27 A long-standing mystery in biology about the longer lifespans of bigger creatures may be explained by the application of a physical law called the Constructal Law. What this law proposes is that anything that flows -- a river, bloodstream or highway... 阅读全文>>

日期：2012-08-27 Sunbathing may be healthy -- at least for one group of North American insects that apparently uses the activity to fight off germs, Simon Fraser University scientists have found. Western Boxelder bugs (WBB), found largely in B.C. interior regions, a... 阅读全文>>

日期：2012-08-27 Applied physicists at the Harvard School of Engineering and Applied Sciences (SEAS) have created an ultrathin, flat lens that focuses light without imparting the distortions of conventional lenses. At a mere 60 nanometers thick, the flat lens is ess... 阅读全文>>

日期：2012-08-27 Only two per cent of Canadians believe climate change is not occurring, a new important survey released August 24 by IPAC-CO2 Research Inc. concluded. The survey comes on the heels of Alberta Premier Alison Redford's recent push for a National Energ... 阅读全文>>

日期：2012-08-24 Numerous processes in our body fluctuate（波动，动摇） in a regular pattern during the day. These circadian (or daily) variations can be driven by local oscillators（振荡器） present within our cells or by systemic signals controlled by the master p... 阅读全文>>

日期：2012-08-24 A nanoparticle developed at Rice University and tested in collaboration with Baylor College of Medicine (BCM) may bring great benefits to the emergency treatment of brain-injury victims, even those with mild injuries. Combined polyethylene glycol-hy... 阅读全文>>

日期：2012-08-24 Researchers from Rice University have just unveiled a new multi-antenna technology that could help wireless providers keep pace with the voracious（贪婪的） demands of data-hungry smartphones and tablets. The technology aims to dramatically increase... 阅读全文>>

日期：2012-08-24 They are one of the most destructive forces of nature on Earth, but now environmental scientists are working to tame the hurricane. In a paper, published in Atmospheric Science Letters, the authors propose using cloud seeding to decrease sea surface... 阅读全文>>

日期：2012-08-22 How do stem cells preserve their ability to become any type of cell in the body? And how do they decide to give up that magical state and start specializing? If researchers could answer these questions, our ability to harness stem cells to treat dis... 阅读全文>>

日期：2012-08-22 People with Parkinson's disease performed markedly better on a test of working memory after a night's sleep, and sleep disorders can interfere with that benefit, researchers have shown. While the classic symptoms of Parkinson's disease include tremo... 阅读全文>>

日期：2012-08-22 Fierce galactic winds powered by an intense burst of star formation may blow gas right out of massive galaxies, shutting down their ability to make new stars. Sifting through images and data from three telescopes, a team of astronomers found 29 obje... 阅读全文>>

日期：2012-08-22 Fueling nuclear reactors with uranium harvested from the ocean could become more feasible because of a material developed by a team led by the Department of Energy's Oak Ridge National Laboratory. The combination of ORNL's high-capacity reusable ads... 阅读全文>>

日期：2012-08-21 European paper wasps（胡蜂） (Polistes dominula) advertise the size of their poison glands to potential predators, finds a new study published in BioMed Central's open access journal Frontiers in Zoology. The brighter the colour, the larger the pois... 阅读全文>>

日期：2012-08-21 In evaluating the bioactive compounds of Illinois blueberry and blackberry wines, University of Illinois scientists have found compounds that inhibit enzymes responsible for carbohydrate（碳水化合物） absorption and assimilation（同化，吸收） . And... 阅读全文>>