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  1. Math

    Sensor Sensibility

    Networks of tiny computerized sensors that adjust their function as needed may soon pervade our environment.

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  2. Archaeology

    Peru’s Sunny View

    Researchers have found the oldest solar observatory in the Americas, a group of 13 towers first used around 300 B.C. to mark the positions of sunrises and sunsets from summer to winter solstice.

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  3. Humans

    Letters from the May 5, 2007, issue of Science News

    Mere kats? “Science behind the Soap Opera” (SN: 3/3/07, p. 138) shows that meerkats bear an uncanny resemblance to human beings. We, too, have an innate sense of responsibility for our group and individually commit acts of unspeakable violence.