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  1. Physics

    Tiny wires trigger electric reversal

    Ultrathin zinc nanowires exhibit a puzzling conductivity reversal that flies in the face of known wire behavior.

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  2. Earth

    Shafts of snow sculpted by sun

    Physicists have created miniature, laboratory versions of towering snow spikes found high in the Andes Mountains.

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  3. 19662

    This article doesn’t say that penitentes appear only in the Andes, nor does it say in what part of the Andes they appear. Does the formation of penitentes require that the sun be nearly directly overhead for part of the day? Can penitentes form only near the equator? Burton LoupeeCedar Rapids, Iowa Penitentes are also […]

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  4. Animals

    Wary male spiders woo lifelessly

    When trying to court a cannibalistic female spider, males of a certain species play dead.