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Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the northern polar jet stream, the high, fast-moving torrent of air that circles the pole. The jet stream is slowing and meandering more, she proposes, causing extreme weather patterns to linger longer over North America. The idea has drawn extensive attention from the media, the pu Read More
 



Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the northern polar jet stream, the high, fast-moving torrent of air that circles the pole. The jet stream is slowing and meandering more, she proposes, causing extreme weather patterns to linger longer over North America. The idea has drawn extensive attention from the media, the pu Read More
 



Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500 light-years away. Because such stars make up three-quarters of all stars in the Milky Way, the finding could open a wide new hunting ground for extraterrestrial life.Author: Yudhijit Bhattacharjee Read More
 



A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow increasing emissions of greenhouse gases. In an advance, however, the report's authors have used increasingly sophisticated models to evaluate how political and economic issues could affect various strategies to reduce emissions. It finds that growing opposition to biofuels and c Read More
 



Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity in these long-gone species by computationally mapping where a chemical modification called methylation occurred in the DNA during the lifetime of the individual. The method takes advantage of how DNA degrades through time. When compared with methylation in modern humans, these met Read More
 



An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now, researchers have engineered a mouse with a humanized liver that readily detects the drug's toxicity and may serve as a novel toxicity screen for other drugs that have yet to enter human trials.Author: Jon Cohen Read More
 



Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the original estimate made in 2006. The soaring cost prompted a key member of Congress to raise questions about continued U.S. support for the project, which aims to make fusion power feasible. "I'm really beginning to believe that our involvement in ITER is not practical," said Sena Read More
 



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