日期：2011-09-09 Researchers have confirmed the age of possibly our oldest direct human ancestor at 1.98 million years old. The discovery was made after researchers conducted further dating of the early human fossils, Australopithecus sediba（南方古猿人） , found in... 阅读全文>>

日期：2011-09-09 We know that in keeping the body physically healthy, the mind both conscious and unconscious is a principle actor. Indeed, research has shown that the biological, or physiological, immune system that fights pathogens（病原体） once they've entered t... 阅读全文>>

日期：2011-09-09 Usually, running five minutes late is a bad thing since you might lose your dinner reservation or miss out on tickets to the latest show. But when a planet runs five minutes late, astronomers get excited because it suggests that another world is nea... 阅读全文>>

日期：2011-09-08 Each year, more than 170 million people visit national forests for recreation（娱乐，消遣） . And the physical activity associated with these visits burns 290 billion food calories. That equals enough french fries laid end to end to reach the Moon a... 阅读全文>>

日期：2011-09-08 Researchers at Northwestern University Feinberg School of Medicine have discovered why the immune cells of people with rheumatoid arthritis（风湿性关节炎） become hyperactive and attack the joints and bones. The immune cells have lost their bouncer,... 阅读全文>>

日期：2011-09-08 A three-year series of research flights from the Arctic to the Antarctic has successfully produced an unprecedented portrait of greenhouse gases and particles in the atmosphere, scientists announced. The far-reaching field project, known as HIPPO, i... 阅读全文>>

日期：2011-09-08 A team of leading marine scientists from around the world is recommending an end to most commercial fishing in the deep sea, Earth's largest ecosystem. Instead, they recommend fishing in more productive waters nearer to consumers. In a comprehensive... 阅读全文>>

日期：2011-09-07 People who volunteer may live longer than those who don't, as long as their reasons for volunteering are to help others rather than themselves, suggests new research published by the American Psychological Association. This was the first time resear... 阅读全文>>

日期：2011-09-07 Women who drink 15 grams or less of alcohol a day (the equivalent of one drink of any alcoholic beverage) at midlife may be healthier when older than women who do not drink at all, who consume more than two drinks a day, or who consume four drinks o... 阅读全文>>

日期：2011-09-07 Fungi that cause severe infections in those with compromised immune systems are resisting the action of the latest group of antifungal drugs. Uncovering their strategies for doing this will lead to more effective treatments, says a scientist speakin... 阅读全文>>

日期：2011-09-07 Scientists have discovered a biological switch that gives energy-storing white fat the characteristics of energy-burning brown fat. The findings could lead to new strategies for treating obesity. The animal study by researchers at The Ohio State Uni... 阅读全文>>

日期：2011-09-06 Researchers at Northwestern University have created a new kind of cloaking material that can render objects invisible in the terahertz（兆赫） range. Though this design can't translate into an invisibility cloak for the visible spectrum, it could ha... 阅读全文>>

日期：2011-09-06 A bacterial strain that specifically targets tumours could soon be used as a vehicle to deliver drugs in frontline cancer therapy. The strain is expected to be tested in cancer patients in 2013 says a scientist at the Society for General Microbiolog... 阅读全文>>

日期：2011-09-06 A novel way of increasing the amounts of antibiotics produced by bacteria has been discovered that could markedly improve the yields of these important compounds in commercial production. It could also be valuable in helping to discover new compound... 阅读全文>>

日期：2011-09-06 You may think your lack of resolve to get off the couch to exercise is because you're lazy, but McMaster University researchers have discovered it may be you are missing key genes. The researchers made their unexpected finding while working with hea... 阅读全文>>

日期：2011-09-04 Genetic detective work by an international group of researchers may have solved a decades-long mystery of the source of a devastating tree-killing fungus（真菌） that has hit six of the world's seven continents. In a study published Sept. 1 in the p... 阅读全文>>

日期：2011-09-04 Like snakes, tumour cells shed their skin. Cancer is not a static（静态的） disease but during its development the disease accumulates changes to evade natural defences adapting to new environmental circumstances, protecting against chemotherapy and... 阅读全文>>

日期：2011-09-04 What does a typical European face look like according to Europeans? It all depends on which European you ask. Germans think the typical European looks more German; Portuguese people think the typical European looks more Portuguese. That's the conclu... 阅读全文>>

日期：2011-09-04 A new paper published in the journal Science reveals the discovery of a primitive woolly rhino（犀牛） fossil in the Himalayas, which suggests some giant mammals first evolved in present-day Tibet before the beginning of the Ice Age. The extinction... 阅读全文>>

日期：2011-09-02 The risk of breast cancer dropped significantly in mice when their regular diet included a modest amount of walnut（胡桃） , Marshall University researchers report in the journal Nutrition and Cancer. The study, led by Elaine Hardman, Ph.D., of Mars... 阅读全文>>