This research shows that damselfly species lose color variation when living together, adopting distinct colors to avoid misidentification and conflict. Experiments reveal they cannot distinguish species when polymorphic, leading evolution to favor visual divergence. The findings illustrate how natural selection can reduce aggression and promote coexistence between closely related species.

This research uses cavefish to reveal how evolution reshapes the brain. By comparing surface and cave-adapted forms, it shows that neural circuits lost to vision are repurposed for touch and smell. These findings demonstrate how evolution refines existing brain structures to meet environmental demands.