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Dan Knudsen

I am a contributor at HearHealth.org (a website about ears), and I enjoy researching topics.  Early medicine is favorite area of interest.

Dan Knudsen's collections

 

Early Ear Technology

<p>A few images illustrating the evolution of early hearing aids, ear plugs, and a ear spoon.  This is a collection of interests.  </p>
Dan Knudsen
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