Microstructured barbs on the North American porcupine quill enable easy tissue penetration and difficult removal
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Adirondack Wildlife: The Porcupine Gives Birth - - The Adirondack Almanack
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Quill You Be Mine?
Microstructured barbs on the North American porcupine quill enable easy tissue penetration and difficult removal
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Medical marvels borrowed from nature itself including porcupine quills for stitches
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