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  1. Physics

    When warming up causes cooling down

    Under the right circumstances, heating a tiny cluster of sodium atoms makes its temperature fall.

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  2. Physics

    Physicists get B in antimatter studies

    New observations that subatomic particles called B mesons decay differently from their antimatter versions may help explain why the universe is made almost entirely of matter, not antimatter.

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  3. Quoll male die-off doesn’t fit pattern

    Males of a ferretlike marsupial called a quoll die off after one mating season-unusual behavior that suggests the need for new theories of why such deaths occur after mating.

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  4. Stick insects: Three females remain

    An Australian expedition locates three females of a big, flightless stick insect species thought to have gone extinct.

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  5. Why Fly into a Forest Fire?

    Scientists puzzle over why some wasps and beetles race to forest fires.

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  6. From the March 7, 1931, issue

    CANYON DE CHELLY NOW NATIONAL MONUMENT A famous canyon of the West, with ancient Indian ruins under the shelter of its thousand-foot red walls, has been given the status of a National Monument, by an act of Congress recently signed by the President. This is the Canyon de Chelly in Arizona, with its tributaries, Canyon […]

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  7. Tech

    Flying Leap

    In the history of human flight, first came the daring tinkerers who gave wings to the pent-up human desire to soar. In the wake of their successes came a remarkable proliferation of flying machines, spacecraft, and colorful characters. At this Web site, the American Institute of Aeronautics and Astronautics celebrates these achievements with an annotated […]

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  8. Astronomy

    Magnetic flip heralds solar max

    Scientists have found another indicator that the sun has reached the maximum of its current activity cycle: The polarity of its magnetic field has reversed.

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  9. Astronomy

    In moon race, Saturn is still champ

    New discoveries have raised the retinue of Saturn's known moons to 30, making the ringed planet the solar system's champ.

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  10. Health & Medicine

    Surveying the Swiss: The eyes have it

    Magnetic resonance imaging can help determine the health of a wheel of cheese.

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  11. Living it up below the ice sheet?

    A recent earthquake in Antarctica points toward geologic activity that could provide the energy necessary to incubate life in a liquid lake deep beneath the ice.

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  12. Health & Medicine

    The Good Trans Fat

    One arcane family of fats may be tapped to treat or prevent a host of diseases.

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