PLOS Biology<p><a href="https://fediscience.org/tags/Archaea" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Archaea</span></a> sometimes turn against <a href="https://fediscience.org/tags/Bacteria" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Bacteria</span></a> using hitherto unknown mechanisms. This Primer explores a <span class="h-card" translate="no"><a href="https://fediscience.org/@PLOSBiology" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>PLOSBiology</span></a></span> study that reveals bacterium-killing peptidoglycan hydrolases in archaea. Paper: <a href="https://plos.io/4lrJBBa" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">plos.io/4lrJBBa</span><span class="invisible"></span></a> Primer: <a href="https://plos.io/3HGMYpU" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">plos.io/3HGMYpU</span><span class="invisible"></span></a></p>