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Why porcupine quills slide in with ease but come out with difficulty
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blogs.discovermagazine.com/...e-but-come-out-with-difficulty
porcupine
quills
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whitnese
on 05 Oct 14
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whitnese
on 05 Oct 14
This article is particularly well written because of the amount of background research that was done. There were tests performed and their results were used in the article.
<div class="cArrow"> </div><div class="cContentInner">This article is particularly well written because of the amount of background research that was done. There were tests performed and their results were used in the article.</div>
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