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Though burning natural gas produces much less greenhouse gas emissions than burning coal, a new study indicates switching over coal-fired power plants to natural gas would have a negligible effect on the changing climate. Tom Wigley, a senior research associate at the National Center for Atmospheric Research, reports that if natural gas were substituted for coal in energy production, climate change trends would not slow down and may, in fact, accelerate. His findings are due to be published in the journal Climatic Change Letters

From building-blocking bollards to millimeter-wave scanners , the September 11 terrorist attacks have led to significant changes in security techniques and technology worldwide over the past decade to discourage future attacks and to avoid being surprised again. To meet these goals, law enforcement and counterterrorism operations worldwide have come to rely heavily on surveillance of public spaces. Nowhere is surveillance more pervasive in the U.S

CAUGHT TOO EARLY In discussing the search for better detection of breast cancer in “ Beyond Mammograms ,” Nancy Shute misses one key problem: when tests become too “perfect.” As we have learned from our experience in detecting prostate cancer by testing for high levels of the prostate-specific antigen protein, finding cancers at extraordinarily early stages raises new issues. Are we now left to treat cancers that have no clinical relevance? We already often diagnose breast cancers at one to three millimeters in size.

The Dyslexic Advantage: Unlocking the Hidden Potential of the Dyslexic Brain by Brock L. and Fernette F.

The 9/11 attacks , the deadliest terrorist acts on U.S.

The terrorist attacks of September 11th drastically changed the security strategy of NYC. A massive camera network, dubbed the 'Ring of Steel' , is at the heart of this new strategy. In the first of three videos we watch it as it watches us.

By Roberta Rampton ROCKVILLE, Maryland (Reuters) - Last month's record earthquake in the eastern United States may have shaken a Virginia nuclear plant twice as hard as it was designed to withstand, a spokesman for the U.S. nuclear safety regulator said on Thursday.

The attacks of September 11, 2001, were a shocking and emotionally raw event that most adults, especially in the U.S., still have trouble comprehending . For children under 14, however, the events of that day are but a page of history, a modern-day Pearl Harbor. Now, with the 10th anniversary of these attacks upon us, psychologists, educators and parents are thinking again about how best to teach children about the traumatic day and its aftermath--as well as the complicated threat of terrorism .

More than half-a-billion smartphones will likely be sold in the coming year.

The terrorist attacks that shook the United States 10 years ago had effects that reached all the way into space. Not only did the events of Sept. 11, 2001, prompt NASA to immediately beef up its already strict security procedures, they forced military space officials to reassess their priorities regarding space security and triggered a shift in space policy .

By Ewen Callaway of Nature magazine New descriptions of Australopithecus sediba fossils have added to debates about the species' place in the human lineage.

No shortage of articles have been published about the deep distrust exhibited by most 2012 Republican presidential candidates toward specific scientific findings--notably evolution and climate change--as well as in some cases toward science itself. [More]

* New station crew will not fly until problem found, fixed * Former commander says it is time to bring in the Chinese [More]

Thar’s gold in them thar hills--and we may have meteorites to thank. Because it appears that a rain of meteors nearly 4 billion years ago peppered the Earth’s exterior with precious metals