That isn't new either. From dalke's reference: Intriguingly, the behaviour is mo... | Hacker News

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iamcurious on April 18, 2015 | parent | context | favorite | on: Female Chimps Seen Making, Wielding Spears

That isn't new either. From dalke's reference:

    Intriguingly, the behaviour is mostly confined to females and immature chimps.

jonlucc on April 18, 2015 [–]

This isn't my field, but as far as I can tell, they've done a more systematic study of which chimps are making the spears to confirm the previous observation that it was often females.

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