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  1. Earth

    Shake Down: Deep tremors observed at San Andreas fault

    Patterns of activity for a type of tremor that occurs deep beneath California's San Andreas fault may offer scientists a way to foretell earthquake activity there.

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  2. 19496

    This article mentions “ferricyanide, an electron-hungry molecule.” This puzzled me no end. Aren’t ferricyanide molecules, unlike their ions, electrically neutral? I’m trying to visualize ravenous molecules gobbling up innocent electrons. Ernest NussbaumBethesda, Md. Ferricyanide is indeed an ion, with a negative charge of –3. It’s electron hungry because, counterintuitively, it draws an electron from the […]

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  3. Materials Science

    Sweet Glow: Nanotube sensor brightens path to glucose detection

    An implantable glucose sensor based on carbon nanotubes could allow patients with diabetes to monitor their blood sugar levels without the need for daily pinprick tests.