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  1. Tech

    The descent of music

    Using an evolutionary process, researchers create pleasing tunes out of grating noise.

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  2. Space

    American Astronomical Society Meeting

    Highlights from the 220th AAS meeting held June 10-14 in Anchorage, Alaska.

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  3. Earth

    Geologists play with puzzles about past and future supercontinents

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  4. Astronomy

    Giant celestial disk hard to explain

    A star's oversized debris ring challenges theories of planet formation.

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  5. Life

    Chicks do worse in noisy nests

    Baby bluebirds, and their parents, appear to have trouble communicating over the racket made by nearby humans.