日期：2012-03-01 Fifty million years ago, India slammed into Eurasia（欧亚大陆） , a collision that gave rise to the tallest landforms on the planet, the Himalaya Mountains and the Tibetan Plateau. India and Eurasia continue to converge（聚合） today, though at an e... 阅读全文>>

日期：2012-03-01 Law enforcement officials who are tasked with identifying a body based on partial skeletal remains have a new tool at their disposal. A new paper from North Carolina State University researchers details how to determine the biological sex of skeleta... 阅读全文>>

日期：2012-03-01 A new NASA study revealed that the oldest and thickest Arctic sea ice is disappearing at a faster rate than the younger and thinner ice at the edges of the Arctic Ocean's floating ice cap. The thicker ice, known as multi-year ice, survives through t... 阅读全文>>

日期：2012-02-29 People are relying on sleeping pills more than ever to get a good night's rest, but a new study by Scripps Clinic researchers links the medications to a 4.6 times higher risk of death and a significant increase in cancer cases among regular pill use... 阅读全文>>

日期：2012-02-29 Mobile phones currently on the market are capable of showing high quality images and video, but the phones' small size sets insurmountable（不能克服的） limits on screen size, and thus the viewing experience. VTT Technical Research Centre of Finland... 阅读全文>>

日期：2012-02-29 Coyotes（土狼） today are pint-sized compared to their Ice Age counterparts, finds a new fossil study. Between 11,500 and 10,000 years ago -- a mere blink of an eye in geologic（地质的） terms -- coyotes shrunk to their present size. The sudden shri... 阅读全文>>

日期：2012-02-29 We make our eye movements earlier or later in order to coordinate with movements of our arms, New York University neuroscientists have found. Their study, which appears in the journal Neuron, points to a mechanism in the brain that allows for this c... 阅读全文>>

日期：2012-02-28 The frigid McMurdo Dry Valleys in Antarctica are a cold, polar desert, yet the sandy soils there are frequently dotted with moist patches in the spring despite a lack of snowmelt and no possibility of rain. A new study, led by an Oregon State Univer... 阅读全文>>

日期：2012-02-28 Seawater circulation pumps hydrogen and boron（硼） into the oceanic plates that make up the seafloor, and some of this seawater remains trapped as the plates descend into the mantle（地幔） at areas called subduction（俯冲） zones. By analyzing sam... 阅读全文>>

日期：2012-02-28 The major difference between plant and animal cells is the photosynthetic（光合作用的） process, which converts light energy into chemical energy. When light isn't available, energy is generated by breaking down carbohydrates（碳水化物） and sugars,... 阅读全文>>

日期：2012-02-28 In the past few years, the video game industry has grown from a niche market into a major part of mainstream media. This increase in popularity and use of technology has allowed video game developers to insert more detail and nuance（细微差别） into... 阅读全文>>

日期：2012-02-27 Children with autism（自闭症） spectrum disorders who also have serious behavioral problems responded better to medication combined with training for their parents than to treatment with medication alone, Yale researchers and their colleagues report... 阅读全文>>

日期：2012-02-27 Linear dunes, widespread on Earth and Saturn's moon, Titan, are generally considered to have been formed by deposits of windblown sand. It has been speculated for some time that some linear dunes may have formed by wind-rift erosion, but this model... 阅读全文>>

日期：2012-02-27 A new study reports that the disintegration（瓦解，崩溃） of the Maya Civilization may have been related to relatively modest reductions in rainfall. The study was led by Professors Martn Medina-Elizalde of the Yucatan Center for Scientific Research... 阅读全文>>

日期：2012-02-27 When one fish gets injured, the rest of the school takes off in fear, tipped off by a mysterious substance known as Schreckstoff (meaning scary stuff in German). Now, researchers reporting online on February 23 in the Cell Press journal Current Biol... 阅读全文>>

日期：2012-02-27 When Sifrhippus, the earliest known horse, first appeared in the forests of North America more than 50 million years ago, it would not have been mistaken for a Clydesdale（强健的挽马） . It weighed in at around 12 pounds -- and it was destined to ge... 阅读全文>>

日期：2012-02-23 Sudden cardiac death -catastrophic and unexpected fatal heart stoppage -- is more likely to occur shortly after waking in the morning and in the late night. In a report in the journal Nature, an international consortium of researchers that includes... 阅读全文>>

日期：2012-02-23 A team coordinated by Mathias Pessiglione, Inserm researcher at the Centre de recherche en neurosciences de la Piti Salptrire (Inserm/UPMC-Universit Pierre and Marie Curie/CNRS) have identified the part of the brain driving motivation during actions... 阅读全文>>

日期：2012-02-23 New research has established the miracle material called graphene as the world's thinnest known coating for protecting metals against corrosion. Their study on this potential new use of graphene（石墨烯） appears in ACS Nano. In the study, Dhiraj Pr... 阅读全文>>

日期：2012-02-22 The ability to anticipate future events allows us to plan and exert（运用，发挥） control over our lives, but it may also contribute to stress-related increased risk for the diseases of aging, according to a study by UCSF researchers. In a study of... 阅读全文>>