As an aside, an algorithm based on ant pheromones is a clever way to solve the traveling salesman problem.<p><a href="http:&#x2F;&#x2F;people.idsia.ch&#x2F;~luca&#x2F;acs-bio97.pdf" rel="nofollow">http:&#x2F;&#x2F;people.idsia.ch&#x2F;~luca&#x2F;acs-bio97.pdf</a>