日期：2013-08-20 Researchers have shown that ancient Egyptian iron beads held at the UCL Petrie Museum were hammered from pieces of meteorites（陨石） , rather than iron ore. The objects, which trace their origins to outer space, also predate the emergence of iron s... 阅读全文>>

日期：2013-08-19 The biological information that makes us unique is encoded in our DNA. DNA damage is a natural biological occurrence that happens every time cells divide and multiply. External factors such as overexposure to sunlight can also damage DNA. Understand... 阅读全文>>

日期：2013-08-19 Studying the evolution and anatomy（解剖学） of galaxies using the Hubble Space Telescope, an international team of astronomers led by doctoral candidate BoMee Lee and her advisor Mauro Giavalisco at the University of Massachusetts Amherst have esta... 阅读全文>>

日期：2013-08-19 Scientists at The Scripps Research Institute (TSRI) have discovered the molecular mechanism by which the deadly Ebola virus assembles, providing potential new drug targets. Surprisingly, the study showed that the same molecule that assembles and rel... 阅读全文>>

日期：2013-08-19 Americans buy more soft drinks per capita than people in any other country. These drinks are consumed by individuals of all ages, including very young children. Although soft drink consumption is associated with aggression, depression, and suicidal... 阅读全文>>

日期：2013-08-19 From frogs to humans, selecting a mate is complicated. Females of many species judge suitors based on many indicators of health or parenting potential. But it can be difficult for males to produce multiple signals that demonstrate these qualities si... 阅读全文>>

日期：2013-08-16 Researchers at the University of Adelaide have discovered a novel and complex visual circuit in a dragonfly's brain that could one day help to improve vision systems for robots. Dr Steven Wiederman and Associate Professor David O'Carroll from the Un... 阅读全文>>

日期：2013-08-16 All organs in our body rely on stem cells in order to maintain their function. The skin is our largest organ and forms a shield against the environment. New research results from BRIC, University of Copenhagen and Cambridge University, challenge cur... 阅读全文>>

日期：2013-08-16 A new analysis of ostriches（鸵鸟） reveals that a computer model of long-necked sauropods（蜥脚类动物） used to simulate the dinosaurs' movements, featured in BBC's Walking with Dinosaurs and the focus of an installation at the American Museum of N... 阅读全文>>

日期：2013-08-16 Monitoring slow earthquakes may provide a basis for reliable prediction in areas where slow quakes trigger normal earthquakes, according to Penn State geoscientists. We currently don't have any way to remotely monitor when land faults are about to m... 阅读全文>>

日期：2013-08-16 The essence of male beauty is down to the way males use their genes rather than what genes they have, according to a new study into the sexual attractiveness of turkeys. Geneticists have long puzzled over why individuals of the same sex show a great... 阅读全文>>

日期：2013-08-16 Observed in the wild, tucked away in museum collections, and even exhibited in zoos around the world -- there is one mysterious creature that has been a victim of mistaken identity for more than 100 years. A team of Smithsonian scientists, however,... 阅读全文>>

日期：2013-08-15 About 10 percent of the U.S. population suffers from dyslexia（阅读障碍） , a condition that makes learning to read difficult. Dyslexia is usually diagnosed around second grade, but the results of a new study from MIT could help identify those child... 阅读全文>>

日期：2013-08-15 Preschool children who showed less ability to estimate the number of objects in a group were 2.4 times more likely to have a later mathematical learning disability than other young people, according to a team of University of Missouri psychologists.... 阅读全文>>

日期：2013-08-15 With stamp collecting a popular hobby and lucrative（赚钱的） investment, scientists are describing a comprehensive new way of verifying the authenticity and rooting out fakes of what may be the smallest and most valuable pieces of paper on Earth. T... 阅读全文>>

日期：2013-08-15 Comparing plant communities today with a survey taken 50 years ago, a UA-led research team is providing the first on-the-ground evidence for Southwestern plants being pushed to higher elevations by an increasingly warmer and drier climate. In a rare... 阅读全文>>

日期：2013-08-15 Computer science researchers from North Carolina State University have developed a technique to determine which strategies give players an edge at winning in multi-player (action) real-time strategy (ARTS) games, such as Defense of the Ancients (Dot... 阅读全文>>

日期：2013-08-15 Forensic DNA-based familial search methods may mistakenly identify individuals in a database as siblings or parents of an unknown perpetrator（犯罪者） , when in fact they are distant relatives, according to research published August 14 in the open... 阅读全文>>

日期：2013-08-15 For more than a century scientists have known that Earth's ice ages are caused by the wobbling（摆动，颤抖） of the planet's orbit, which changes its orientation to the sun and affects the amount of sunlight reaching higher latitudes, particularly t... 阅读全文>>

日期：2013-08-14 A radical shortening of their bony tails over 100 million years ago enabled the earliest birds to develop versatile（多才多艺的） legs that gave them an evolutionary edge, a new study shows. A team led by Oxford University scientists examined fossil... 阅读全文>>