日期：2012-01-31 Killer whales (Orcinus orca) are the top marine predator, wherever they are found, and seem to eat everything from schools of small fish to large baleen whales（须鲸） , over twice their own size. The increase in hunting territories available to kil... 阅读全文>>

日期：2012-01-30 Japan used seawater to cool nuclear fuel at the stricken Fukushima-Daiichi nuclear plant after the tsunami in March 2011 -- and that was probably the best action to take at the time, says Professor Alexandra Navrotsky of the University of California... 阅读全文>>

日期：2012-01-30 Whenever we fall ill, there are many different factors that come together to influence the course of our illness. Additional medical conditions, stress levels, and social support all have an impact on our health and well-being, especially when we ar... 阅读全文>>

日期：2012-01-30 Researchers at Oregon Health Science University have discovered that a molecule critical to the development and plasticity（可塑性） of nerve cells - brain-derived neurotrophic factor (BDNF) - is severely lacking in brainstem neurons in mutations le... 阅读全文>>

日期：2012-01-30 In a 2007 episode of the television show Boston Legal, a character claimed to have figured out that a cop was racist because his amygdala（扁桃腺） activated -- displaying fear, when they showed him pictures of black people. This link between the am... 阅读全文>>

日期：2012-01-19 If you are unhappy at work, it could be partly due to your boss' management style, according to a new study by Dr. Nicolas Gillet, from the Universit Franois Rabelais in Tours in France, and his team. Both over-controlling managers who use threats a... 阅读全文>>

日期：2012-01-19 A University of Missouri researcher and his colleague have conducted a review that casts doubt on the accuracy of a popular theory that attempted to explain why there are more men than women in top levels of mathematic fields. The researchers found... 阅读全文>>

日期：2012-01-19 People living along the coast of Peru were eating popcorn 1,000 years earlier than previously reported and before ceramic（陶瓷的） pottery was used there, according to a new paper in the Proceedings of the National Academy of Sciences co-authored b... 阅读全文>>

日期：2012-01-19 Scientists from the Florida campus of The Scripps Research Institute have identified a compound that can help repair a specific type of defect in RNA, a type of genetic material. The methods in the new study could accelerate the development of thera... 阅读全文>>

日期：2012-01-18 Insects, equipped with complex compound eyes, can maintain a constant heading in their travels, some of them for thousands of miles. New research demonstrates that fruit flies keep their bearings by using the polarization（极化，偏振） pattern of na... 阅读全文>>

日期：2012-01-18 Listen up, pedestrians（行人 ） wearing headphones. Can you hear the trains or cars around you? Many probably can't, especially young adult males. Serious injuries to pedestrians listening to headphones have more than tripled in six years, according... 阅读全文>>

日期：2012-01-18 For the first time ever, stem cells from umbilical cords（脐带） have been converted into other types of cells, which may eventually lead to new treatment options for spinal cord injuries and multiple sclerosis（多发性硬化） , among other nervous sy... 阅读全文>>

日期：2012-01-18 For centuries, gossip has been dismissed as salacious（猥亵的） , idle chatter that can damage reputations and erode trust. But a new study from the University of California, Berkeley, suggests rumor-mongering can have positive outcomes such as help... 阅读全文>>

日期：2012-01-18 By looking at the stability of the atmosphere, wind farm operators could gain greater insight into the amount of power generated at any given time. Power generated by a wind turbine largely depends on the wind speed. In a wind farm in which the turb... 阅读全文>>

日期：2012-01-16 A previously un-named species of horse fly whose appearance is dominated by its glamorous（迷人的） golden lower abdomen has been named in honour of American pop diva（歌剧中的首席女主角） , Beyonc. According to the Australian National Insect Collec... 阅读全文>>

日期：2012-01-16 Scientists working at the Medical Research Council have identified changes in the patterns of sugar molecules that line pre-cancerous cells in the esophagus（食管） , a condition called Barrett's dysplasia（发育不良） , making it much easier to dete... 阅读全文>>

日期：2012-01-13 A recent study at Oregon State University found that the chlorophyll（叶绿素） in green vegetables offers protection against cancer when tested against the modest carcinogen（致癌物质） exposure levels most likely to be found in the environment. How... 阅读全文>>

日期：2012-01-13 Since the discovery of the microscope, scientists have tried to visualize smaller and smaller structures to provide insights into the inner workings of human cells, bacteria and viruses. Now, researchers at the National Institute of Arthritis and Mu... 阅读全文>>

日期：2012-01-13 Scientists at the Salk Institute for Biological Studies have identified a gene that tells cells to develop multiple cilia（纤毛，睫毛） , tiny hair-like structures that move fluids through the lungs and brain. The finding may help scientists generat... 阅读全文>>

日期：2012-01-13 Researchers from the Georgia Institute of Technology and the Centers for Disease Control and Prevention (CDC) have developed a new laboratory test that can rapidly identify the bacterium（细菌） responsible for staph（葡萄球菌） infections. This new... 阅读全文>>