日期：2013-02-24 A protein known for turning on genes to help cells survive low-oxygen conditions also slows down the copying of new DNA strands, thus shutting down the growth of new cells, Johns Hopkins researchers report. Their discovery has wide-ranging implicati... 阅读全文>>

日期：2013-02-21 The tropics（热带地区） are home to an extraordinary diversity of insect species. How great is it, exactly? We do not know, but today, researchers at the Santa Barbara Museum of Natural History published a study on tropical beetles that can help us... 阅读全文>>

日期：2013-02-21 Understanding how and why diversification（多样化，变化） occurs is important for understanding why there are so many species on Earth. In a new study published on 19 February in the open access journal PLOS Biology, researchers show that similar --... 阅读全文>>

日期：2013-02-21 The base pairs that hold together two pieces of RNA, the older cousin of DNA, are some of the most important molecular interactions in living cells. Many scientists believe that these base pairs were part of life from the very beginning and that RNA... 阅读全文>>

日期：2013-02-21 Contrary to other research, a new study found that the total level of antioxidants in people's diets is not related to their risk of developing stroke or dementia. The study is published in the February 20, 2013, online issue of Neurology, the medic... 阅读全文>>

日期：2013-02-21 Tomatoes grown on organic farms accumulate higher concentrations of sugars, vitamin C and compounds associated with oxidative stress compared to those grown on conventional farms, according to research published February 20 in the open access journa... 阅读全文>>

日期：2013-02-21 Mosquitoes are able to ignore the smell of the insect repellent（杀虫剂） DEET within a few hours of being exposed to it, according to research published February 20 in the open access journal PLOS ONE by James Logan, Nina Stanczyk and colleagues fr... 阅读全文>>

日期：2013-02-19 While many people recognize that clean water and air are signs of a healthy ecosystem, most do not realize that a critical part of the environment is right beneath their feet, according to a Penn State hydrologist. The ground plays an important role... 阅读全文>>

日期：2013-02-19 In his Feb. 12 State of the Union address, President Obama singled out climate change as a top priority for his second administration. We can choose to believe that Superstorm Sandy, and the most severe drought in decades, and the worst wildfires so... 阅读全文>>

日期：2013-02-19 It has been almost 20 years since the first genetically modified foods showed up in produce aisles throughout the United States and the rest of the world, but controversy continues to surround the products and their regulation. Bruce Chassy, a profe... 阅读全文>>

日期：2013-02-19 Children and adolescents who watch a lot of television are more likely to manifest antisocial and criminal behaviour when they become adults, according to a new University of Otago, New Zealand, study published online in the journal Pediatrics（小儿... 阅读全文>>

日期：2013-02-19 DNA preserved in calcified bacteria on the teeth of ancient human skeletons has shed light on the health consequences of the evolving diet and behaviour from the Stone Age to the modern day. The ancient genetic record reveals the negative changes in... 阅读全文>>

日期：2013-02-18 Our love of music and appreciation of musical harmony is learnt and not based on natural ability, a new study by University of Melbourne researchers has found. Associate Professor Neil McLachlan from the Melbourne School of Psychological Sciences sa... 阅读全文>>

日期：2013-02-18 2012 marked the 40th anniversary of the Clean Water Act, which established regulations for the discharge of pollutants to waterways and supported the building of sewage treatment plants. Despite these advances, sewage remains a major source of pharm... 阅读全文>>

日期：2013-02-18 New data from NASA's Chandra X-ray Observatory suggest a highly distorted（歪曲的） supernova remnant may contain the most recent black hole formed in the Milky Way galaxy. The remnant appears to be the product of a rare explosion in which matter is... 阅读全文>>

日期：2013-02-18 Researchers at The University of Arizona Cancer Center at St. Joseph's Hospital and Medical Center in Phoenix have discovered that many women with low-grade serous（血浆的） carcinoma（癌） of the ovary or peritoneum（腹膜） have seen their tumors s... 阅读全文>>

日期：2013-02-18 Ever wonder why sand can both run through an hourglass（沙漏） like a liquid and be solid enough to support buildings? It's because granular（颗粒的） materials -- like sand or dirt -- can change their behavior, or state. Researchers from North Caro... 阅读全文>>

日期：2013-02-18 A team of researchers at the University of Waterloo's Institute for Quantum Computing has proposed a new computational model that may become the architecture for a scalable quantum computer. In a paper to be published in the journal Science this wee... 阅读全文>>

日期：2013-02-06 Obesity can lower vitamin D levels in the body, a study suggests. 研究显示，肥胖会降低体内维生素D含量。 The report, in the journal PLOS Medicine, analysed genetic data from 21 studies - a total of 42,000 people. It found every 10% rise in body mass... 阅读全文>>

日期：2013-02-06 The UK dog population is estimated to be around ten million, with dogs producing approximately 1,000 tonnes of excrement（粪便） each day. New research has shown that dogs act as a major source of the parasite egg, Toxocara, which can potentially co... 阅读全文>>