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E.g., 11/19/2017
Your search has returned 19 articles:
  • News

    Recurrent Eruption: Explosive stellar saga

    Imagine the blast of a nuclear bomb as heavy as Earth and you'll get some idea of the energy unleashed in each of the six thermonuclear explosions that have ripped off the outer layers of a dense, nearby star in the past 108 years.

    During the star's most recent outburst, which occurred in February, astronomers obtained their sharpest look yet at this recurrent type of explosion,...

    07/19/2006 - 20:00 Astronomy
  • News

    Big Headache: Auras may add risk to migraines

    As if the headaches weren't enough. Women who experience migraines that are preceded by sensory irregularities face a heightened risk of heart attack, stroke, and other cardiovascular problems, a long-term study of middle-aged women shows.

    Some people with migraines have sensory anomalies, called auras, which can include zigzag lines or spots of light in the visual field or grayed...

    07/19/2006 - 18:16 Biomedicine
  • News

    Sandy clues to ancient climate

    The orientation of these dunes in north-central Nebraska provide a clue that the climate there a millennium ago was much different than it is today. The Nebraska Sand Hills have been frozen in place by vegetation for 800 to 1,000 years, says David B. Loope, a geologist at the University of Nebraska in Lincoln.

    The 12-to-15-meter-tall dunes, which run from west-northwest to east-...

    07/19/2006 - 17:33 Earth
  • News

    From Mind to Matter: Data analysis challenges psychokinesis

    Scientists have long considered claims that people can manipulate the physical world with their minds. Yet numerous experiments conducted over the past 35 years, in which people try to influence the output of computers that generate random sequences of 1s and 0s, have overall failed to demonstrate the existence of so-called psychokinetic effects, according to a new analysis. Some individual...

    07/19/2006 - 13:57
  • News

    Deadly Disorder: Imagined-ugliness illness yields high suicide rate

    The suicide rate among people with a psychiatric disorder that causes them to perceive themselves as ugly is higher than that among people with major depression, says a new report.

    Over the course of a 4-year study, 2 of 185 patients with body dysmorphic disorder (BDD) committed suicide. That's twice the suicide rate in severely depressed people and 45 times that expected in a general...

    07/19/2006 - 13:32
  • News

    Gender Divide: Gene expression differs in males and females

    There are far more biological differences between males and females than meet the naked eye. A new study suggests that the two sexes vary in the amounts of proteins produced by thousands of genes—information that could explain why some diseases strike men and women differently.

    "We're certainly conscious that sex can have an effect on numerous diseases," says Thomas Drake of the...

    07/19/2006 - 13:01
  • News

    Bee Concerned: Big study—Selective pollinators are declining

    A million records from insect-spotting hobbyists in Europe contain the broadest evidence so far of a decline among some of the region's pollinators and the wild plants that need them, says an international research team.

    The new study shows that since the 1980s, bees have dwindled in diversity in Britain and the Netherlands, as have wild plants that are at the mercy of...

    07/19/2006 - 12:28
  • News

    Terrific Timekeeper: Optical atomic clock beats world standard

    Physicists in Colorado say that they've refined an innovative atomic clock to be more precise than the breed of clocks that's been the best for 50 years.

    The advance indicates that the reign of atomic clocks tuned to the element cesium is coming to an end, says physicist James C. Bergquist of the National Institute of Standards and Technology (NIST) in Boulder, Colo., who led the...

    07/19/2006 - 11:23 Physics
  • News

    Global warming heats up nursery of hurricanes

    A record number of tropical storms and hurricanes formed in the North Atlantic last year (SN: 12/24 & 31/05, p. 406: Available to subscribers at Beyond the ABC's: North Atlantic posts record hurricane season). One factor driving this unprecedented activity was the unusually warm waters there, and global warming was largely to blame, says Kevin E. Trenberth, an atmospheric scientist at the...

    07/19/2006 - 10:19 Earth
  • News

    Alaskan coral beds get new protection

    Huge tracts of delicate coral gardens and soft-coral forests off the coast of Alaska will be permanently protected from fishing gear that targets groundfish and shellfish by scraping the seafloor.

    Most of the affected sites have never been disturbed by this gear. The National Oceanic and Atmospheric Administration (NOAA) on June 28 announced its new rule to preserve that...

    07/19/2006 - 10:04 Earth & Environment