日期：2014-07-09 Sedentary lifestyle and not caloric intake may be to blame for increased obesity in the US, according to a new analysis of data from the National Health and Nutrition Examination Survey (NHANES). A study published in The American Journal of Medicine... 阅读全文>>

日期：2014-07-09 When a breeding wolf dies, its sex and the size of its pack can determine whether that pack continues, according to research published July online by the Journal of Animal Ecology. In 2012, biologists at Denali National Park and Preserve noted a dro... 阅读全文>>

日期：2014-07-09 A perspective article published last month by University of California, Riverside chemists in the Journal of Physical Chemistry Letters was selected as an Editors Choice -- an honor only a handful of research papers receive. The perspective reviews... 阅读全文>>

日期：2014-07-09 Throughout evolution, living things have repeatedly developed physically distinct sexes, but how does this actually happen? A discovery in the multicellular green alga, Volvox carteri, has revealed the genetic origin of male and female sexes, showin... 阅读全文>>

日期：2014-07-09 The Earth has experienced many dramatic changes in climate since the dinosaurs went extinct 66 million years ago. One of the warmest periods was the early Eocene Epoch, 50 to 53 million years ago. During this interval, North American mammal communit... 阅读全文>>

日期：2014-07-08 Babies' growth in the womb and their size at birth, especially their length, are strikingly similar the world over -- when babies are born to healthy, well-educated and well-nourished mothers. That's the finding of a landmark international study, IN... 阅读全文>>

日期：2014-07-08 A new UBC Sauder School of Business study shows that teenagers who work at summer or evening jobs gain a competitive advantage later in life. Developing early knowledge of the working world and how to manage in it, they are more likely to find good... 阅读全文>>

日期：2014-07-08 Every year, wildfires clear millions of hectares of land and emit around 34-percent of global soot（煤烟，烟灰） mass into the atmosphere. In certain regions, such as Southeast Asia and Russia, these fires can contribute as much as 63-percent of reg... 阅读全文>>

日期：2014-07-08 Want to be more productive and happier during the workday? Try taking a short break to text a friend, play Angry Birds or check Facebook on your smartphone, according to Kansas State University research. In his latest research, Sooyeol Kim, doctoral... 阅读全文>>

日期：2014-07-08 The way rats use their whiskers（胡须，腮须） is more similar to how humans use their hands and fingers than previously thought, new research from the University of Sheffield has found. Rats deliberately change how they sense their environment using... 阅读全文>>

日期：2014-07-08 Scientists have identified the fossilized remains of an extinct giant bird that could be the biggest flying bird ever found. With an estimated 20-24-foot wingspan, the creature surpassed size estimates based on wing bones from the previous record ho... 阅读全文>>

日期：2014-07-05 Hi, everybody. This week, I spent a couple days in Minneapolis, talking with people about their lives-their concerns, their successes, and their hopes for the future. I went because of a letter I received from a working mother named Rebekah, who sha... 阅读全文>>

日期：2014-07-05 For hibernating mammals, the pre-winter months are a race against time to accumulate enough energy reserves to last until spring. Offspring born late in the year have much less time to achieve this. Austrian scientists have discovered that power-nap... 阅读全文>>

日期：2014-07-04 Boston researchers have identified a way to enhance regrowth of human corneal（角膜的） tissue to restore vision, using a molecule known as ABCB5 that acts as a marker for hard-to-find limbal stem cells. This work, a collaboration between the Massac... 阅读全文>>

日期：2014-07-04 Millions of microbial species populate the world, but so far only a few have been identified due to the inability of most microbes to grow in the laboratory. Edgar Goluch, an engineer, and Slava Epstein, a biologist, aim to change this. The pair, bo... 阅读全文>>

日期：2014-07-04 Determining the age of stars has long been a challenge for astronomers. In experiments published in the journal Science, researchers at KU Leuven's Institute for Astronomy show that 'infant' stars can be distinguished from 'adolescent' stars by meas... 阅读全文>>

日期：2014-07-04 A frog's jump is not as simple as it seems....Australian scientists have discovered that different species adopt different jumping styles depending on their environment. Lead researcher, Miss Marta Vidal-Garcia ( PhD candidate, Australian National U... 阅读全文>>

日期：2014-07-04 A research team from The University of Nottingham has carried out the first molecular characterisation of the African elephant's adipose tissue（脂肪组织） -- body fat. This new information will form the basis of future studies aimed at securing the... 阅读全文>>

日期：2014-07-04 A new species of spider wasp, the 'Bone-house Wasp,' may use chemical cues from dead ants as a nest protection strategy, according to a recent study published July 2, 2014 in the open-access journal PLOS ONE by Michael Staab from University of Freib... 阅读全文>>

日期：2014-07-04 In an unexpected discovery, researchers have found that the complex eyes of mantis shrimp are equipped with optics that generate ultraviolet (UV) color vision. Mantis shrimp's six UV photoreceptors pick up on different colors within the UV spectrum... 阅读全文>>