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  1. 19416

    The phenomenon described in your article, an animal manufacturing natural poisons using chemical precursors in the environment, has been described before—in a work of science fiction! In Arthur Herzog’s 1974 novel The Swarm, later made into a movie, killer bees learned to metabolize organophosphate insecticides and incorporate those molecules into their venom. Dave LeisingLowell, Mich.

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  2. Animals

    Toxin Takeout: Frogs borrow poison for skin from ants

    Scientists have identified formicine ants as a food source from which poison frogs acquire their chemical weapons.

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  3. 19415

    Other librarians and I regularly discuss illiterate, functional, aliterate, and avid readers. I am pleased that research has begun into what happens in readers’ brains.