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Your search has returned 32 articles:
  • Feature

    Bright Lights, Big Cancer

    In late 1987, Richard G. Stevens, then at Pacific Northwest Laboratories in Richland, Wash., typed up a short letter and mailed it to Walter Willett at Harvard Medical School in Boston. The two epidemiologists had met just once, and Stevens wasn't confident that his 209-word note, or the suggestion that it contained about a possible contributor to breast cancer, would inspire any action.

    01/04/2006 - 14:23 Biomedicine
  • News

    Gauging Star Birth: Spacecraft uses gamma rays as stellar tracer

    By detecting the radioactive remains of material hurled into space by dying stars, astronomers have estimated that, on average, our galaxy churns out seven new stars each year.

    The researchers used the European Space Agency's INTEGRAL spacecraft to record gamma-ray light, which is high-energy radiation undetectable from Earth's surface. They collected the particular...

    01/04/2006 - 13:44 Astronomy
  • News

    Mass movement

    Earth's gravitational field changed measurably in response to the December 2004 tsunami-spawning earthquake west of Sumatra. The Gravity Recovery and Climate Experiment (GRACE) mission's satellites noted changes associated with the temblor—the first such feat, says Byron D. Tapley, director of the Center for Space Research at the University of Texas at Austin. GRACE's data depict an area—...

    01/04/2006 - 13:30 Earth
  • News

    Quantum Chip: Device handles ions as if they were data

    Physicists have created a microchip that can hold an electrically charged atom and move it back and forth within a narrow channel. These manipulations lay the groundwork for using trapped ions as data bits in computer chips, the developers of the new device say.

    The scientists created the chip as a step toward a new breed of computers, called quantum computers, which...

    01/04/2006 - 13:08 Physics
  • News

    Locust Upset: DNA puts swarmer's origin in Africa

    The desert locust, often blamed for modern crop ruin and biblical plagues, was not an ancient export from the Americas, say DNA analysts.

    Some biologists had recently argued that Africa's storied locust arose from ancestors of today's New World Schistocerca species that crossed the Atlantic Ocean. That's backwards, Nathan R. Lovejoy of the University of Toronto at...

    01/04/2006 - 12:40 Animals