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  1. Math

    Primes, Palindromes, and Pyramids

    Prime numbers that have the same sequence of digits whether read forward or backward can be built into pyramids.

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  2. Humans

    From the August 24, 1935, issue

    Learning from spiders, a tiny electric motor, and two new cancer-causing chemicals.

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  3. Earth

    Sea Monitors

    Developed by researchers at the Georgia Tech Research Institute, SeaMaven is a new Web portal that gives students access to data collected from naval platforms 60 miles off the coast of Georgia. Eight platforms, currently operated by the U.S. Navy for flight training, have been equipped with sophisticated sensors to monitor various ocean and meteorological […]

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  4. Animals

    What’s That Knocking? Sound evidence offered for long-lost woodpecker

    Cornell's Laboratory of Ornithology has released recordings from the woods of eastern Arkansas that researchers say could be the distinctive drumming and calls of the ivory-billed woodpecker.