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Your search has returned 16 articles:
  • News

    Not-So-Clear Alternative: In its air-quality effects, ethanol fuel is similar to gasoline

    Switching the nation's vehicles from gasoline to mostly ethanol will not reduce air pollution, a new study finds. The work joins other evidence questioning the benefits of ethanol fuel.

    Mark Z. Jacobson, an atmospheric scientist at Stanford University, created a model that takes into account how the chemicals emitted in car exhaust transform through reactions in the atmosphere. He...

    05/01/2007 - 20:22 Earth & Environment
  • News

    More Than Bit Players: Snippets of RNA might sway pancreatic cancer

    Cancer of the pancreas is one of the most discouraging diagnoses that a person can receive. The cancer is difficult to detect, so many patients are diagnosed too late for surgical treatment. The majority die within a year of getting the bad news, and only 5 percent survive for 5 years.

    Researchers now find that small pieces of genetic material called microRNAs might provide a preview of...

    05/01/2007 - 20:08 Biomedicine
  • News

    Liquid Center: Mercury has a molten core, radar reveals

    Mercury is hot stuff. That's the conclusion of a new radar study demonstrating that the core of the solar system's innermost planet is at least partially molten. The finding settles a long-simmering debate about the least studied of the planets. It may also provide insight about how the solar system created its planets.

    With Mercury averaging just a third as far from the sun...

    05/01/2007 - 20:01 Planetary Science
  • News

    Automatic Networking: Brain systems charge up in unconscious monkeys

    Anesthetized monkeys may be dead to the world, but their brains remain surprisingly lively. Organized patterns of activity continually course through neural networks that during waking life control the animals' eye movements and other critical functions, a new brain-scan investigation finds.

    Unconscious monkeys also display a type of spontaneous brain activity that until now had been...

    05/01/2007 - 19:54
  • News

    Quantum Loophole: Some quirks of physics can be good for science

    Quantum theory notoriously sets limits on how precisely we can make measurements. But the quirks of the quantum realm can also be turned to advantage. Physicists have now demonstrated a way to almost double measurement precision when using photons to gauge distances.

    Like markings on a ruler, the orderly waves of laser light can be used to measure lengths. In an...

    05/01/2007 - 19:44 Physics
  • News

    Talk to the Hand: Language might have evolved from gestures

    Chimpanzees and bonobos can communicate with greater flexibility using hand gestures than they can with facial expressions or vocalizations, new research shows. Their use of hand motions to convey different meanings in different circumstances suggests that gestures may have played an important part in the evolution of language.

    Researchers speculate about how prehuman...

    05/01/2007 - 19:07
  • News

    Less Is More (Bone): Yearly osteoporosis drug reduces fractures

    Older women with osteoporosis who received yearly infusions of a drug that prevents bone loss had far fewer fractures than did peers who didn't get the drug.

    Over 3 years, the women who received zoledronic acid intravenously had about one-third as many spine fractures as did women who received a placebo. The drug-treated group also had significantly fewer fractures of the hip, wrist,...

    05/01/2007 - 18:48 Biomedicine
  • News

    A solar forecast

    Solar activity, which waxes and wanes in an 11-year cycle, will most likely begin its next round in March 2008 and peak sometime between late 2011 and mid 2012, predicts the National Oceanic & Atmospheric Administration's (NOAA) Space Environment Center in Boulder, Colo.

    During the peak of activity, eruptions such as solar flares and coronal mass ejections hurl X rays, ultraviolet...

    04/30/2007 - 19:45 Planetary Science
  • News

    Spider blood fluoresces

    Fluorescence under ultraviolet light seems to be a widespread trait among spiders, say researchers who have done the first broad survey of spiders for this property.

    The researchers tested blood from representatives of 10 diverse families and found that while under ultraviolet (UV) illumination, all samples glowed blue to human eyes, says Susan Masta of Portland...

    04/30/2007 - 19:32 Animals
  • News

    Lake Superior is warming faster than its local climate

    In recent decades, the waters of Lake Superior have warmed significantly faster than have air temperatures at nearby sites onshore—a trend caused at least in part by a long-term decrease in the lake's winter ice cover, scientists say.

    Between 1979 and 2006, the average summertime air temperature at 31 sites within 500 kilometers of the center of Lake Superior rose about 1.5°C, says Jay...

    04/30/2007 - 19:04 Earth