Nails like humans and apes have seem pretty weak compared to claws, and even other tree-dwelling species have hooked claws.
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Nails, and ours specifically, are best used for grooming and removing parasites. This is a great way to bond socially. I’ve read that the shape of our nails is one of the many reasons why we became the social creatures that we are today and why we bonded so well with some other animals.
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