Manlio De Domenico<p>From leaf cutter ants and the human brain to the cosmic web, from Facebook to salmons and flocking birds: what connects them all?</p><p>They were the protagonists of my first lecture on <a href="https://mathstodon.xyz/tags/ComplexSystems" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComplexSystems</span></a> in my course on the physics of <a href="https://mathstodon.xyz/tags/ComplexNetworks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComplexNetworks</span></a>!</p>