日期:2016-05-12 Chemists have taken another major step in the quest to use carbon-hydrogen bonds to create new molecules, a strategy that aims to revolutionize the field of organic synthesis. The journal Nature is publishing the work by chemists at Emory University... 阅读全文>>

日期:2016-05-12 The Zika virus strain circulating in Brazil was shown to be able to infect and cause damage to mice fetuses. In stem cell cultures of the human nervous system, the virus infection resulted in the cell death. Compared to the virus circulating in Afri... 阅读全文>>

日期:2016-05-11 A new study from Tel Aviv University, Cornell University and the Albert Einstein College of Medicine reveals genetic proof of the Jewish roots of the Bene Israel community in the western part of India. They have always considered themselves Jewish.... 阅读全文>>

日期:2016-05-11 Researchers at Tufts University have stabilized blood samples for long periods of time without refrigeration and at high temperatures by encapsulating them in air-dried silk protein. The technique, which is published online this week in the Proceedi... 阅读全文>>

日期:2016-05-11 In 1940, the Tacoma Narrows Bridge collapsed in dramatic fashion, twisting in the wind before it snapped and plunged into the water below. As wind blew across the span, the flow induced oscillating sideways forces that helped bring down the bridge -... 阅读全文>>

日期:2016-05-11 Scientists from Princeton University and NASA have confirmed that 1,284 objects observed outside Earths solar system by NASAs Kepler spacecraft are indeed planets. Reported in The Astrophysical Journal on May 10, it is the largest single announcemen... 阅读全文>>

日期:2016-05-06 The leopard (Panthera pardus), one of the worlds most iconic big cats, has lost as much as 75 percent of its historic range, according to a paper published today in the scientific journal PeerJ. Conducted by partners including the National Geographi... 阅读全文>>

日期:2016-05-06 Rechargeable lithium air batteries are a next-generation technology: Theoretically they might be much lighter and offer better performance than current lithium ion batteries. However, currently they run out of steam after only a few charging cycles.... 阅读全文>>

日期:2016-05-06 The sex of many reptile species is set by temperature. New research reported in the journal GENETICS identifies the first gene associated with temperature-dependent sex determination in any reptile. Variation at this gene in snapping turtles contrib... 阅读全文>>

日期:2016-05-06 Vultures. Cartoon characters in parched deserts often wish them to disappear, since circling vultures are a stereotypical harbinger of death. But, joking aside, vultures in some parts of the world are in danger of disappearing. And according to a ne... 阅读全文>>

日期:2016-04-29 A new study examining wildfires in California found that human activity explains as much about their frequency and location as climate influences. The researchers systematically looked at human behaviors and climate change together, which is unique... 阅读全文>>

日期:2016-04-29 People who have had a traumatic brain injury (TBI) may still have sleep problems a year and a half after being injured, according to a study published in the April 27, 2016, online issue of Neurology, the medical journal of the American Academy of N... 阅读全文>>

日期:2016-04-29 Forest scientists have found an unexpected silver lining to the insect outbreaks that have ravaged millions of trees across western North America. While insect outbreaks leave trees looking like matchsticks, a new University of Vermont-led study fin... 阅读全文>>

日期:2016-04-29 Two-dimensional phosphane, a material known as phosphorene, has potential application as a material for semiconducting transistors in ever faster and more powerful computers. But theres a hitch. Many of the useful properties of this material, like i... 阅读全文>>

日期:2016-04-28 In the world of chemistry, one minus one almost always equals zero. But new research from Northwestern University and the Centre National de la Recherche Scientifique (CNRS) in France shows that is not always the case. And the discovery will change... 阅读全文>>

日期:2016-04-28 Researchers at University of Montreal have created a programmable DNA thermometer that is 20,000x smaller than a human hair. This scientific advance reported this week in the journal Nano Letters may significantly aid our understanding of natural an... 阅读全文>>

日期:2016-04-28 Evolution can go quickly when it has to - at least for small organisms. Researchers exposed a natural setting in Denmark to artificial climate change and discovered that soil just half a degree warmer caused the genome of small worms to change surpr... 阅读全文>>

日期:2016-04-28 Rio is a California sea lion who can solve IQ tests that many people have trouble passing. In fact, she is so smart that scientists at the Long Marine Lab at the University of California, Santa Cruz designed a series of tests that prove she is the f... 阅读全文>>

日期:2016-04-27 A study led by researchers at Lund University in Sweden shows that ravens are as clever as chimpanzees, despite having much smaller brains, indicating that rather than the size of the brain, the neuronal density and the structure of the birds brains... 阅读全文>>

日期:2016-04-27 Drought could render the U.S. Northeasts mixed forests unsustainable after 2050 while Washingtons Cascade Mountains may require tropical and subtropical forest species, according to researchers using a new type of mathematical model at Washington St... 阅读全文>>

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