A new study about fish speciation suggests that human brain stimulation can have evolutionary consequences. Brain stimulation, eh? You mean like Portal 2. From io9:
The elephantfish, like a few other creatures who live in cloudy water, communicates via weak electrical signals. Using a special organ that sends and receives the signals, the fish are able to navigate and find each other even when there is zero visibility. Washington University biologist Bruce Carlson has studied roughly 200 species of these fish for many years, and wanted to find out if there was any connection between the structure of the fishes’ brains and their rapid speciation. What he found was that brain complexity seemed to cause fish to evolve and diversify quickly. And the brain complexity came directly from the fishes’ sensory processing power.