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  1. 19365

    I do not know about the rest of your readers, but I do “hear” at least some low frequency sounds, but not with my ears. The nerves in my feet feel these vibrations and my brain parses the sounds to my flight-or-fright processor before I can process any conscious perception. Ray BryanSt. Paul, Minn.

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  2. Earth

    Infrasonic Symphony

    Scientists are eavesdropping on volcanoes, avalanches, earthquakes, and meteorites to discern these phenomena's infrasound signatures and see what new information infrasound might reveal.

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  3. 19360

    In the arts, we say that material, such as paper, that deteriorates readily because of its composition has “internal vice.” I suppose that could be said of newspapers on several grounds.