日期：2012-10-17 Sumatran orangutans have undergone a substantial recent population decline, according to a new genetic study, but the same research revealed the existence of critical corridors for dispersal（分散，传播） migrations that, if protected, can help main... 阅读全文>>

日期：2012-10-15 Using gravitational lenses in space, University of Utah astronomers discovered that the centers of the biggest galaxies are growing denser -- evidence of repeated collisions and mergers by massive galaxies with 100 billion stars. We found that durin... 阅读全文>>

日期：2012-10-15 When ancestral humans walked out of Africa tens of thousands of years ago, Drosophila melanogaster（果蝇） fruit flies came along with them. Now the fruit flies, widely used for genetics research, are returning to Africa and establishing new populat... 阅读全文>>

日期：2012-10-15 A new report published today by Panthera confirms that widespread illegal hunting and the bushmeat trade occur more frequently and with greater impact on wildlife populations in the Southern and Eastern savannas（热带稀树草原） of Africa than previo... 阅读全文>>

日期：2012-10-15 Scientists from the University of Southampton have identified a repeating trigger for the largest explosive volcanic eruptions on Earth. The Las Caadas volcanic caldera on Tenerife, in the Canary Islands, has generated at least eight major eruptions... 阅读全文>>

日期：2012-10-15 The most likely source of the water locked inside soils on the moon's surface is the constant stream of charged particles from the sun known as the solar wind, a University of Michigan researcher and his colleagues have concluded. Over the last five... 阅读全文>>

日期：2012-10-15 Chinese emperors were once thought by their subjects able to make it rain with their prayers. Chinese officials today put more trust in science. They are boosting spending on what they call the world's largest programme of artificial rainmaking. Its... 阅读全文>>

日期：2012-10-12 A new study improves our understanding of plasma sources, a state of matter similar to gas in which a certain portion of the particles are ionised and which are used for example in plasma display panels. These results revealed by physicists from the... 阅读全文>>

日期：2012-10-12 Women are twice as likely as men to use emoticons（情感符） in text messages, according to a new study from Rice University. Emoticons are graphic symbols that use punctuation marks（标点符号） and letters to represent facial expressions to convey a... 阅读全文>>

日期：2012-10-12 At very low temperatures, close to absolute zero, chemical reactions may proceed at a much higher rate than classical chemistry says they should -- because in this extreme chill, quantum effects enter the picture. A Weizmann Institute of Science tea... 阅读全文>>

日期：2012-10-12 New research led by Yale University scientists suggests that a rocky planet twice Earth's size orbiting a nearby star is a diamond planet. This is our first glimpse of a rocky world with a fundamentally different chemistry from Earth, said lead rese... 阅读全文>>

日期：2012-10-12 Topaz（黄晶，黄玉） is a hard, transparent mineral. It is a compound of aluminum, silica, and fluorine（氟）. Gem topaz is valuable. Jewelers call this variety of the stone precious topaz. The best-known precious topaz gems range in color from rich... 阅读全文>>

日期：2012-10-09 Emissions of the greenhouse gas methane（甲烷） into the atmosphere can be traced back thousands of years in the Greenland ice sheet. Using special analytical methods, researchers from the Niels Bohr Institute, among others, have determined how much... 阅读全文>>

日期：2012-10-09 Scientists at the Gladstone Institutes have mapped the precise frequency by which genes get turned on across the human genome, providing new insight into the most fundamental of cellular processes -- and revealing new clues as to what happens when t... 阅读全文>>

日期：2012-10-09 In a finding that runs counter to commonly held beliefs about fresh being better, a clinical trial published October 8 by the Journal of the American Medical Association shows that acutely（剧烈地） ill premature babies who received fresher blood di... 阅读全文>>

日期：2012-10-09 A study of children in the New Bedford, Mass., area suggests that low-level prenatal（产前的） mercury exposure may be associated with a greater risk of attention-deficit/hyperactivity disorder (ADHD)-related behaviors and that fish consumption duri... 阅读全文>>

日期：2012-10-08 Expanding production of palm oil, a common ingredient in processed foods, soaps and personal care products, is driving rainforest destruction and massive carbon dioxide emissions, according to a new study led by researchers at Stanford and Yale univ... 阅读全文>>

日期：2012-10-08 An African mosquito species with a deadly capacity to transmit malaria（疟疾） has a perplexing evolutionary history, according to discovery by researchers at the Fralin Life Science Institute at Virginia Tech. Closely related African mosquito speci... 阅读全文>>

日期：2012-10-08 Warming temperatures in Ohio are a key driver behind changes in the state's landscape, and non-native plant species appear to be responding more strongly than native wildflowers to the changing climate, new research suggests. This adaptive nature de... 阅读全文>>

日期：2012-10-08 These proteins are required for melanocyte（黑素细胞） stem cell self-maintenance and, as such, correct pigmentation throughout the mice's life span. Without these two proteins, the mice's fur turns white. Their research is published in the review C... 阅读全文>>