A porcupine has approximately 30,000 spines... Have human beings even one to walk upright?... - Post by Blackjackuar on Boldomatic

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A porcupine has approximately 30,000 spines...
Have human beings even one to walk upright?...

A porcupine has approximately 30,000 spines... Have human beings even one to walk upright?...

#spines, #and, #backbone

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