IEEE Spectrum publlshed a different take on the Swiss research we posted on August 28th, in an article titled Robots evolve to exploit inadvertent cues.
The researchers set up a group of S-bots equipped with omnidirectional cameras and light-emitting rings around their body in a bio-inspired foraging task (see picture above). Like many animals, the robots used visual cues to forage for two food sources in the arena. Rather than pre-programming the robots' control rules, the researchers used artificial evolution to develop the robots' control systems. As expected, robots capable of efficiently navigating the arena and locating food sources evolved in a matter of a few 100 generations.
This is when things became interesting: Due to the limited amount of food, robots now began to compete for resources. Robots began to evolve strategies to use light inadvertently emitted by their peers to rapidly pinpoint food locations, in some cases even physically pushing them away to make room for themselves. As evolution progressed, the exploited robots were soon all but extinct. A new generation of robots ensued that could conceal their presence by emitting confusing patterns of light or by ceasing to emit light altogether.