ANSWERS: 3
  • They probably had no need to, just as animals in the wild have no need to. For a hunter-gatherer with no shoes. normal wear and tear would have kept them as short as could be wished.
  • maybe they bit them off
  • They probably had no need because they use them as tools themselves and naturally wore them down. But sand itself is abrasive and could be used for such. In fact they say walking on the beach is an excellent exfoliant for your feet.

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