Radical Anthropology<p>Study of tool use by elderly <a href="https://c.im/tags/chimpanzees" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>chimpanzees</span></a> in Bossou, Guinea. Looking at archive footage of wild chimpanzees engaging in one of their most complex forms of tool use - the cracking of hard-shelled nuts with hammers and anvil stones. Extent of age-related change in tool engagement and efficiency was very variable.</p><p><a href="https://c.im/tags/senescence" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>senescence</span></a> <a href="https://c.im/tags/primates" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>primates</span></a> <a href="https://c.im/tags/greatapes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>greatapes</span></a> <a href="https://c.im/tags/lifehistory" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lifehistory</span></a></p><p><a href="https://elifesciences.org/reviewed-preprints/105411" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">elifesciences.org/reviewed-pre</span><span class="invisible">prints/105411</span></a></p>