日期：2012-10-26 Assassin bug（猎蝽） , so named because these insects lie in ambush for prey that they attack with speed and precision, are found all over the world. Nearly 140 species of these bugs are blood-sucking; because they can bite humans around the mouth,... 阅读全文>>

日期：2012-10-26 The first mouse model of the common bacterial disease typhoid fever（伤寒症） is reported in a study published by Cell Press October 25 in the journal Cell. Because the animals show human-like symptoms and respond positively to immunization, they co... 阅读全文>>

日期：2012-10-26 When astronauts return to Earth, their altitude isn't the only thing that drops -- their blood pressure does too. This condition, known as orthostatic（直立的） hypotension, occurs in up to half of those astronauts on short-term missions (two weeks... 阅读全文>>

日期：2012-10-26 In the future, warmer waters could significantly change ocean distribution of populations of phytoplankton（浮游植物） , tiny organisms that could have a major effect on climate change. Reporting in this week's online journal Science Express, resear... 阅读全文>>

日期：2012-10-26 NASA's Cassini spacecraft has tracked the aftermath of a rare massive storm on Saturn. Data reveal record-setting disturbances in the planet's upper atmosphere long after the visible signs of the storm abated（减轻） , in addition to an indication t... 阅读全文>>

日期：2012-10-25 Scientists report that they can predict who will improve most on an unfamiliar video game by looking at their brain waves. They describe their findings in a paper in the journal Psychophysiology. The researchers used electroencephalography (EEG) to... 阅读全文>>

日期：2012-10-25 Joint research between the University of Michigan and the Argentina-based National Council of Science and Technology (CONICET) has shed light on one of the most frustrating mysteries of weight loss -- why the weight inevitably comes back. A novel an... 阅读全文>>

日期：2012-10-25 Putting a speed limit on cargo ships as they sail near ports and coastlines could cut their emission of air pollutants by up to 70 percent, reducing the impact of marine shipping on Earth's climate and human health, scientists have found. Their eval... 阅读全文>>

日期：2012-10-25 ESA's quartet of satellites studying Earth's magnetosphere（磁气圈） , Cluster, has discovered that our protective magnetic bubble lets the solar wind in under a wider range of conditions than previously believed. Earth's magnetic field is our plane... 阅读全文>>

日期：2012-10-25 Nearly 80 million Americans would no longer need to take vitamin D supplements under new Institute of Medicine guidelines, according to a study by Loyola University Chicago Stritch School of Medicine researchers. Results were published Oct. 24, 2012... 阅读全文>>

日期：2012-10-24 A team of researchers from North Carolina State University and the Palo Alto Research Center (PARC) has found more evidence for the preservation of ancient dinosaur proteins, including reactivity to antibodies that target specific proteins normally... 阅读全文>>

日期：2012-10-24 The steady and dramatic decline in the sea ice cover of the Arctic Ocean over the last three decades has become a focus of media and public attention. At the opposite end of Earth, however, something more complex is happening. A new NASA study shows... 阅读全文>>

日期：2012-10-24 Much has been made of graphene's exceptional qualities, from its ability to conduct heat and electricity better than any other material to its unparalleled（无比的） strength: Worked into a composite material, graphene can repel bullets better than... 阅读全文>>

日期：2012-10-24 Japan's Fukushima Dai'ichi nuclear disaster that occurred in 2011 -- a result of the strongest earthquake on record in the country and the powerful tsunami waves it triggered -- underscored the need for a method to monitor the status of nuclear fuel... 阅读全文>>

日期：2012-10-24 Do you get tired when others yawn（哈欠） ? Does your dog get tired when you yawn? New research from Lund University in Sweden establishes that dogs catch yawns from humans. But not if the dogs are too young. The study, published in Springer's journ... 阅读全文>>

日期：2012-10-23 Marijuana use -- both natural and synthetic -- may cause cannabinoid hyperemesis（剧吐） (CH) a little-known but costly effect that researchers suggest is a serious burden to the health care system as it often leads to expensive diagnostic tests and... 阅读全文>>

日期：2012-10-23 A fish's personality can influence how it responds to, and learns from threats, according to a new study by Professor Grant Brown from Concordia University in Canada and his colleagues. Their work, looking at how personality influences a fish's memo... 阅读全文>>

日期：2012-10-23 People who exercise later in life may better protect their brain from age-related changes than those who do not, a study suggests. Researchers found that people over 70 who took regular exercise showed less brain shrinkage over a three-year period t... 阅读全文>>

日期：2012-10-23 Consumers are often less satisfied when they buy or receive products that are easily counted because this makes them focus on value instead of experience, according to a new study in the Journal of Consumer Research. Numbers make us feel more certai... 阅读全文>>

日期：2012-10-23 For the first time, researchers have been able to show by acoustic analysis that whales -- or at least one very special white whale -- can imitate the voices of humans. That's a surprise, because whales typically produce sounds in a manner that is w... 阅读全文>>