Vitorino Ramos, Carlos Fernandes, and Agostinho C. Rosa have released a new paper titled On Ants, Bacteria and Dynamic Environments (PDF format). The paper observes similarities between the swarm behaviors of ants and recently observed social interactions between bacteria. Both show sophisticated patterns of self-organizing behaviour. These behaviours are related to the idea of stigmergy, where "the worker does not direct his work, but is guided by it". The results of software simulations of ant and bacteria colonies are discussed.