日期：2011-05-26 Paleontologists（古生物学家） have discovered that a group of remarkable ancient sea creatures existed for much longer and grew to much larger sizes than previously thought, thanks to extraordinarily well-preserved fossils discovered in Morocco. The... 阅读全文>>

日期：2011-05-25 For many movie stars, their age is a well-kept secret. In space, the same is true of the actual stars. Like our Sun, most stars look almost the same for most of their lives. So how can we tell if a star is one billion or 10 billion years old? Astron... 阅读全文>>

日期：2011-05-25 If internal and international migrants comprised a nation, it would be the third most populous country in the world, just after China and India. Thus, there can be little doubt that population mobility is among the leading policy issues of the 21st... 阅读全文>>

日期：2011-05-25 Sleep deprivation is an issue that affects practising physicians and not only medical residents, and we need to establish standards for maximum work and minimum uninterrupted sleep to ensure patient safety, states an editorial in CMAJ (Canadian Medi... 阅读全文>>

日期：2011-05-25 Many kinds of algae and cyanobacteria（蓝藻细菌） , common water-dwelling microorganisms, are capable of using energy from sunlight to split water molecules and release hydrogen, which holds promise as a clean and carbon-free fuel for the future. On... 阅读全文>>

日期：2011-05-24 Johns Hopkins scientists say that a newly discovered survival protein protects the brain against the effects of stroke in rodent brain tissue by interfering with a particular kind of cell death that's also implicated in complications from diabetes a... 阅读全文>>

日期：2011-05-24 Men who visit art galleries, museums, and the theatre regularly tend to enjoy better health and are more satisfied with life, reveals a study published online in the Journal of Epidemiology and Community Health. The study found that both men and wom... 阅读全文>>

日期：2011-05-24 A new study from American Cancer Society researchers finds use of 30 tablets a month or more of acetaminophen（对乙酰氨基酚） for five or more years was associated with an estimated 38% lower risk of prostate cancer. The study appears in Cancer Epid... 阅读全文>>

日期：2011-05-23 A new computer model of the Gulf of Mexico in the period after the oil spill provides insights into how underwater currents may have primed marine microorganisms to degrade the oil. It is called dynamic（动态的） auto-inoculation. Parcels of water m... 阅读全文>>

日期：2011-05-23 Gothenburg, Sweden: Two trials presented at the Heart Failure Congress 2011, organized by the Heart Failure Association of the European Society of Cardiology（心脏病学） (HFA of the ESC), will help to define the precise populations of patients with... 阅读全文>>

日期：2011-05-20 Archaeologists（考古学家） have discovered a 12,000-year-old iron oxide mine in Chile that marks the oldest evidence of organized mining ever found in the Americas, according to a report in the June issue of Current Anthropology. A team of researche... 阅读全文>>

日期：2011-05-20 Wolbachia（沃尔巴克氏体属） are bacteria that infect many insects, including mosquitoes. However, Wolbachia do not naturally infect Anopheles mosquitoes, which are the type that spreads malaria（疟疾） to humans. Researchers at the Johns Hopkins Blo... 阅读全文>>

日期：2011-05-20 NASA's Cassini spacecraft and a European Southern Observatory ground-based telescope tracked the growth of a giant early-spring storm in Saturn's northern hemisphere that is so powerful it stretches around the entire planet. The rare storm has been... 阅读全文>>

日期：2011-05-19 A University of Utah study shows that men hit harder when they stand on two legs than when they are on all fours, and when hitting downward rather than upward, giving tall, upright males a fighting advantage. This may help explain why our ape-like h... 阅读全文>>

日期：2011-05-19 University of Notre Dame astronomer David Bennett is co-author of a new paper describing the discovery of a new class of planets dark, isolated Jupiter-mass bodies floating alone in space, far from any host star. Bennett and the team of astronomers... 阅读全文>>

日期：2011-05-17 Obese, asthmatic, anxious or depressed children are more likely to experience excessive daytime sleepiness, or EDS, according to Penn State College of Medicine sleep researchers. Although EDS in children is commonly assumed by physicians and the pub... 阅读全文>>

日期：2011-05-17 Efficiency is a problem with today's solar panels; they only collect about 20 percent of available light. Now, a University of Missouri engineer has developed a flexible solar sheet that captures more than 90 percent of available light, and he plans... 阅读全文>>

日期：2011-05-17 Climbing is possibly one of the riskiest things an adult tarantula（狼蛛） can do. Weighing in at anything up to 50gm, the dry attachment systems that keep daintier spiders firmly anchored are on the verge of failure in these colossal（巨大的，异常... 阅读全文>>

日期：2011-05-17 A miniature, easy-to-carry ventilation（通风设备） system with a simple nasal mask may help patients with chronic obstructive pulmonary disease ( COPD慢性阻塞性肺炎 ) become more active, according to research conducted at medical centers in Californ... 阅读全文>>

日期：2011-05-16 Want to convince someone to do something? A new University of Michigan study has some intriguing（有趣的） insights drawn from how we speak. The study, presented May 14 at the annual meeting of the American Association for Public Opinion Research, e... 阅读全文>>