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  1. Chemistry

    Mixed Message: Pheromone blend sends signal

    The meaning of a chemical message released by male Asian elephants depends on the chemical's total concentration as well as on the balance of the chemical's two forms.

    By Aimee Cunningham
  2. Animals

    Ant Iron Chefs: Larvae fix dinner but don’t sneak snacks

    Movies of an ant colony show that larvae are the ones that prepare dinner when meat is on the menu. With Video.

    By Susan Milius
  3. Tech

    Narrow Escape: Sharp nanogutters hustle out wetness

    Nanochannels with sharply tapered edges can dramatically boost fluid flow rates and potentially play a role in improved microchip cooling, fabrics to wick away perspiration, and other uses.