A new Wired article talks about the increasing interest among researchers in optic flow as a solution for UAV vision. Optic flow is the method by which insects with compound eyes, such as Dragonflies, perceive the world. It allows creatures with tiny brains and low resolution eyes to gather enough information quickly to perform highly accurate navigation even in complex environments. It's worth noting that optic flow has been a topic of interest among neural net and software researchers for decades.