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  1. Astronomy

    Creating a warmer, wetter Mars

    A new study adds to the evidence that past volcanic activity could have temporarily created a warmer, wetter Mars, a place on which water once flowed freely.

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  2. Things That Go Thump

    There's a whole world of animal communication by vibration that researchers are now exploring.

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  3. From the March 21, 1931 issue

    MUSHROOMS SUDDEN GROWTH FOLLOWS LONG PREPARATION Quick as a mushrooms growth, is the phrase we like to apply to sudden and unexpected developments. An oil town, a stock-market fortune, the reputation of the writer of a hit, are all referred to the mushroom standard of comparison. Yet the mushroom is no creature of magic, not-here […]

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  4. Computing

    Making the Macintosh

    Interested in computer history? Alex S.