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Your search has returned 28 articles:
  • Feature

    Can you hear me now?

    The Earth is going silent. Digital television signals delivered by cable and satellite are quickly replacing analog broadcasts and reducing the number and power of radio waves leaking into space. For viewers at home, it means more channels and pictures of unsurpassed clarity. But for scientists seeking signs of advanced civilizations beyond the solar system, this sudden radio silence makes...

    04/09/2010 - 16:30 Astronomy
  • Comment

    Debates over definition of planet continue and inspire

    Planetary science is in the midst of a revolution. As recently as the early 1990s, “the planets” consisted of just nine famous objects in our solar system that every school kid learned to recognize by name and appearance. But then, advances in astronomical technology unleashed an explosion of new planetary discoveries on two fronts.

    One of these fronts involved a bewildering variety of...

    11/21/2008 - 13:04 Atom & Cosmos
  • Feature

    Nurturing Our Microbes

    Each of us is a metropolis. Bustling about in everyone's body are tens of trillions of microbes. Some are descended from starter populations provided by mom during birth. Additional bacteria, yeasts, and other life forms hitchhike in with foods. By age 3, everyone's gut hosts a fairly stable, yet diverse, ecosystem.

    Most of the tiny stowaways hide out in the...

    02/26/2008 - 12:45 Biomedicine
  • News

    Deep Impact and Stardust: Still on assignment

    Two old NASA missions have new lives. The agency's Deep Impact mission, which 2 years ago fired a projectile into Comet Tempel 1 and imaged the debris from the explosion, will now journey to Comet Boethin.

    Deep Impact doesn't have another bullet in its arsenal but will fly peaceably to Boethin, getting to within 700 kilometers of the object on Dec. 5, 2008, so it can obtain close...

    08/08/2007 - 09:13 Planetary Science
  • Feature

    Saving Sturgeon

    On a fine spring day alongside a Wisconsin river, several biologists wrestle a muscular, 120-pound fish onto her back and straddle her. The moves wouldn't be out of place in a rodeo. As the team restrains her, one member massages her swollen belly, working her eggs out of a release vent and into a plastic pail. The late-April scene occurs as, throughout the northern Midwest, water...

    02/27/2006 - 12:50 Ecology
  • Feature

    Gadgets from the Quantum Spookhouse

    Computers exploiting the oddities of quantum mechanics may eventually put conventional computers to shame. Theoretically, full-fledged versions of those quantum machines will someday master in an eye blink mathematical puzzles and secret codes that current supercomputers wouldn't crack with a billion years of number crunching.

    The exotic innards of such quantum computers...

    12/04/2001 - 13:41 Technology
  • Feature

    Science & Society

    07/12/1997 - 00:00
  • Feature

    Law and Disorders

    01/07/1995 - 00:00
  • Feature

    From Tough Ruffe to Quagga

    07/25/1992 - 00:00
  • Feature

    When Life Got Hard

    08/25/1990 - 00:00