The number of multiresistant strains of bacteria in hospitals is increasing. Bacteria acquire resistance to antibiotics through mutations in their chromosomes and by incorporating new genes, either from the surrounding environment ...
Cell & Microbiology
Jul 28, 2011
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Twitter said Thursday that it will begin placing advertisements known as "Promoted Tweets" in the timelines of users who follow a particular brand or company.
Internet
Jul 28, 2011
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On Nov. 4, 2010, NASA's EPOXI spacecraft came within 450 miles of Comet Hartley 2, a small comet not even a mile in diameter, which takes about six and a half years to orbit the sun. Designated officially as 103P/Hartley ...
Space Exploration
Jul 28, 2011
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(AP) -- Psychologists and mediators compare the political wrangling over the debt limit to a dangerous game of "chicken" with both sides racing cars at each other head-on.
Social Sciences
Jul 28, 2011
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Water isn't the only thing pouring over Niagara Falls. Pollution from fires in Ontario, Canada is also making the one thousand mile trip, while being measured by NASA's Aqua satellite.
Earth Sciences
Jul 28, 2011
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Scientists at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and their colleagues have discovered a new relation among electric and magnetic fields and differences in temperature, which ...
General Physics
Jul 28, 2011
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In the last 30 years, more than 90 percent of the reef-building coral responsible for maintaining major marine habitats and providing a natural barrier against hurricanes in the Caribbean has disappeared because of a disease ...
Environment
Jul 28, 2011
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The strongest thunderstorms that make up tropical storm Muifa are on the storm's eastern and southern sides, according to infrared imagery from NASA's Aqua satellite. The northern side is being weakened by a nearby weather ...
Earth Sciences
Jul 28, 2011
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During the last prolonged warm spell on Earth, the oceans were at least four meters – and possibly as much as 6.5 meters, or about 20 feet – higher than they are now.
Earth Sciences
Jul 28, 2011
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The researchers discovered that a rainforest vine, pollinated by bats, has evolved dish-shaped leaves with such conspicuous echoes that nectar-feeding bats can find its flowers twice as fast by echolocation. The study is ...
Plants & Animals
Jul 28, 2011
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