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The porcupine has more than 30,000 quills that are stiff hollow hairs that are approximately 3 inches long. With a sharp barb at the end to embed the quill in the predators muscle. As the quill victim tries to free itself, the sharp barb only digs in further. This is used as a defense mecanism.

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1. The porcupine can help people protect themselves by having sharp quills to stab the predators.
2. The porcupine also has a thick layer of fur under their quills to keep them warm.
3. Each toe ends in a sharp, strong claw helps the porcupine with digging his strong claws in to trees to anchor himself as he climbs