日期：2013-06-25 How do fish swim? It is a simple question, but there is no simple answer. Researchers at Northwestern University have revealed some of the mechanical properties that allow fish to perform their complex movements. Their findings, published on June 13... 阅读全文>>

日期：2013-06-25 The brain's pleasure response to tasting food can be measured through the eyes using a common, low-cost ophthalmological（眼科的） tool, according to a study just published in the journal Obesity. If validated, this method could be useful for resear... 阅读全文>>

日期：2013-06-25 New research shows that to prevent starvation at night, plants perform accurate arithmetic（算术，算法） division. The calculation allows them to use up their starch（淀粉） reserves at a constant rate so that they run out almost precisely at dawn.... 阅读全文>>

日期：2013-06-24 The risk posed by some popular antidepressants in early pregnancy is not worth taking for women with mild to moderate depression, an expert has warned. 一位专家警告，某些常用抗抑郁药对患有轻至中度抑郁症的女性在怀孕初期所带来的危险使它们不值得服用。... 阅读全文>>

日期：2013-06-24 On June 20, 2013, at 11:24 p.m., the sun erupted with an Earth-directed coronal（冠状的） mass ejection or CME, a solar phenomenon that can send billions of tons of particles into space that can reach Earth one to three days later. These particles c... 阅读全文>>

日期：2013-06-24 Taking iron daily during pregnancy is associated with a significant increase in birth weight and a reduction in risk of low birth weight, finds a new study. The effects were seen for iron doses up to 66 mg per day. The World Health Organization curr... 阅读全文>>

日期：2013-06-24 As temperatures go up, bison get smaller. Joseph Craine, research assistant professor in the Division of Biology at Kansas State University, examined how climate change during the next 50 years will affect grazing（放牧） animals such as bison and c... 阅读全文>>

日期：2013-06-24 Scientists at the Salk Institute for Biological Studies have demonstrated that sensory regions in the brain develop in a fundamentally different way than previously thought, a finding that may yield new insights into visual and neural disorders. In... 阅读全文>>

日期：2013-06-24 A new discovery about how cells move inside the body may provide scientists with crucial information about disease mechanisms such as the spread of cancer or the constriction of airways caused by asthma（哮喘） . Led by researchers at Harvard School... 阅读全文>>

日期：2013-06-21 Cities have long been likened to organisms, ant colonies, and river networks. But these and other analogies fail to capture the essence of how cities really function. New research by Santa Fe Institute Professor Luis Bettencourt suggests a city is s... 阅读全文>>

日期：2013-06-21 The protected area network in Tanzania is playing a vital role in the survival of savannah（大草原） bird species as they move west in response to climate and environmental changes, according to new research led by the University of York. Using data... 阅读全文>>

日期：2013-06-21 The efficient conversion of sunlight into useful energy is one of the challenges which stand in the way of meeting the world's increasing energy demand in a clean, sustainable way without relying on fossil fuels. Photosynthetic（光合作用的） organis... 阅读全文>>

日期：2013-06-21 Crop yields worldwide are not increasing quickly enough to support estimated global needs in 2050, according to a study published June 19 in the open access journal PLOS ONE by research associate Deepak Ray and colleagues from the Institute on the E... 阅读全文>>

日期：2013-06-21 Human sleeping and waking patterns are largely governed by an internal circadian clock that corresponds closely with the 24-hour cycle of light and darkness. This circadian clock also controls other body functions, such as metabolism and temperature... 阅读全文>>

日期：2013-06-21 A study led by researchers from Lawrence Berkeley National Laboratory has found for the first time that thirdhand smoke -- the noxious residue（残渣，剩余） that clings to virtually all surfaces long after the secondhand smoke from a cigarette has c... 阅读全文>>

日期：2013-06-21 A landmark three-dimensional (3-D) digital reconstruction of a complete human brain, called the BigBrain, now for the first time shows the brain anatomy（解剖学） in microscopic detail -- at a spatial resolution of 20 microns, smaller than the size... 阅读全文>>

日期：2013-06-20 Differences between Martian meteorites（陨石） and rocks examined by a NASA rover can be explained if Mars had an oxygen-rich atmosphere 4000 million years ago -- well before the rise of atmospheric oxygen on Earth 2500m years ago. Scientists from O... 阅读全文>>

日期：2013-06-20 The ongoing global growth in the human population will inevitably crowd out（挤出，推开） mammals and birds and has the potential to threaten hundreds of species with extinction within 40 years, new research shows. Scientists at The Ohio State Unive... 阅读全文>>

日期：2013-06-20 People who are considered unattractive are more likely to be belittled（轻视，贬低） and bullied in the workplace, according to a first-of-its-kind study led by a Michigan State University business scholar. Frankly, it's an ugly finding, said Brent... 阅读全文>>

日期：2013-06-20 Using data gathered by NASA's Lunar Reconnaissance Orbiter (LRO) mission, scientists believe they have solved a mystery from one of the solar system's coldest regions -- a permanently shadowed crater on the moon. They have explained how energetic pa... 阅读全文>>