by Elio and Roberto — As we speak, biofilms are the rage in mi­cro­bi­ol­ogy. And why not, be­ing that most bac­te­ria in na­ture are not free-swim­ming but are at­tached to some sur­face. Model sys­tems for biofilms are there­fore sorely needed. Re­searchers from two in­sti­tu­tions in Bo­gotá, Colom­bia...