日期：2010-12-20 About 580 million years ago, life on Earth began a rapid period of change called the Cambrian（寒武纪） Explosion, a period defined by the birth of new life forms over many millions of years that ultimately helped bring about the modern diversity of... 阅读全文>>

日期：2010-12-18 With frigid（寒冷的，严寒的） temperatures already blanketing much of the United States, the arrival of the winter solstice（冬至） on December 21 may not be an occasion many people feel like celebrating. But a dazzling（耀眼的） total lunar eclipse... 阅读全文>>

日期：2010-12-17 Current diagnostic procedures for posttraumatic stress disorder ( PTSD创伤后精神紧张性精神障碍 ) fail to adequately reflect research into the broad nature of a traumatic（外伤的） event, according to a study that will appear in the January print iss... 阅读全文>>

日期：2010-12-17 UCSF researchers have shown for the first time that the human fetal（胎儿的） immune system arises from an entirely different source than the adult immune system, and is more likely to tolerate than fight foreign substances in its environment. The f... 阅读全文>>

日期：2010-12-17 Wind turbines in Midwestern farm fields may be doing more than churning out（大量生产） electricity. The giant turbine blades that generate renewable energy might also help corn and soybean crops stay cooler and dryer, help them fend off fungal（真... 阅读全文>>

日期：2010-12-17 Caffeine（咖啡因，茶精） consumption in children is often blamed for sleep problems and bedwetting（尿床） . Information on childhood caffeine consumption is limited, and many parents may not know the amount or effects of their child's caffeine cons... 阅读全文>>

日期：2010-12-16 Cold plasma（血浆，等离子体） jets could be a safe, effective alternative to antibiotics to treat multi-drug resistant infections, says a study published this week in the January issue of the Journal of Medical Microbiology. The team of Russian and... 阅读全文>>

日期：2010-12-16 Scientists from all over the world are taking a second, more expansive, look at the car-sized asteroid（小行星） that exploded over Sudan's Nubian Desert in 2008. Initial research was focused on classifying the meteorite（陨星，流星） fragments that... 阅读全文>>

日期：2010-12-16 The manufacturing of nanomaterials has been steadily on the rise in the medical, industrial, and scientific fields. Nanomaterials are materials that are engineered to have dimensions less than 100 nanometers and have very unique properties as a resu... 阅读全文>>

日期：2010-12-16 Is red seaweed（海藻） a viable future biofuel? Now that a University of Illinois metabolic（新陈代谢的） engineer has developed a strain of yeast（酵母） that can make short work of fermenting（发酵） galactose（半乳糖） , the answer is an unequivo... 阅读全文>>

日期：2010-12-15 Scientists at the University of California, San Diego School of Medicine have described for the first time a key inhibitory（禁止的，抑制的） role for the IL-1 signaling pathway in the human innate（先天的，固有的） immune system, providing novel in... 阅读全文>>

日期：2010-12-15 A man in St. Louis and a woman in New Hampshire have received the first kidney transplants made possible through a new national program of the Organ Procurement（采购，获得） and Transplantation Network (OPTN) that uses a Carnegie Mellon University... 阅读全文>>

日期：2010-12-15 While the causes of epileptic seizures（癫痫发作） continue to confound（使混淆，挫败） brain researchers, scientists have been exploring how changes in the coordinated（协调的） activity of brain networks, as monitored through electrodes, might hel... 阅读全文>>

日期：2010-12-15 In an exciting example of international collaboration, a Qatar astronomer teamed with scientists at the Harvard-Smithsonian Center for Astrophysics (CfA) and other institutions to discover a new alien world. This hot Jupiter, now named Qatar-1b, add... 阅读全文>>

日期：2010-12-15 The manufacturing of semiconductor wafers（半导体薄片） used in all types of electronics involves etching（蚀刻） small features onto a wafer with lasers, a process that is ultimately limited by the wavelength of the light itself. The semiconductor... 阅读全文>>

日期：2010-12-15 One of the rarest metals on Earth may be an excellent option for enabling future flash memory chips to continue to increase in speed and density, according to a group of researchers in Taiwan. Incorporating nanocrystals of iridium（铱） into the cri... 阅读全文>>

日期：2010-12-15 The delicate shell, photographed by the NASA/ESA Hubble Space Telescope, appears to float serenely（安详地，沉着地） in the depths of space, but this apparent calm hides an inner turmoil（混乱，骚动） . The gaseous envelope（气囊，气膜） formed as t... 阅读全文>>

日期：2010-12-13 The presence of one to four circulating tumor cells ( CTCs肿瘤细胞 ) in the blood of early-stage breast cancer patients almost doubled patient's risk of cancer relapse and death, and five or more CTCs increased recurrence by 400 percent and death by... 阅读全文>>

日期：2010-12-13 Do not delay treatment of breast cancer just because a woman is pregnant, said lead researcher Sibylle Loibl, Dr. med, of the German Breast Group. This suggestion is based on study results detailing the effects of different treatment options on the... 阅读全文>>

日期：2010-12-13 In the burgeoning（生机勃勃的） field of nano-science there are now many ways of 'writing' molecular-scale messages on a surface, one molecule at a time. The trouble is that writing a molecule at a time takes a very long time. It is much better if t... 阅读全文>>