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  1. Math

    Pushing the Limit

    Scientists are moving closer to constructing superefficient, noisefree data-transmission codes.

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  2. Math

    Ask-a-Friend Marketplaces

    If you ask enough friends, paying for answers to questions can help you get the answers you need from a social network.

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  3. Humans

    From the October 26, 1935, issue

    Electric light without wires, lab-grown flu virus, and superhard glass.

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  4. Astronomy

    Spooky Sounds of Saturn

    For Hallowe’en, tune in to eerie, bizarre sounds from the Saturnian system. These NASA Jet Propulsion Lab Web pages provide sound files based on magnetometer data from Cassini spacecraft observations of Saturn’s moon Enceladus, radar echoes from Titan’s surface, Saturn’s radio emissions, and more.