Interesting. I sometimes wonder how they end up near the lights: there wouldn't seem to be a light source at night for most of their evolution. Maybe they used

Interesting. I sometimes wonder how they end up near the lights: there wouldn't seem to be a light source at night for most of their evolution. Maybe they used the moon in the background. But is it correct to assume that, if something is naturally possible (e.g., bioluminescence), and provides significant evolutionary advantage, the species will evolve it? If so, why are we the only intelligent ones (so far)? Why didn't chimpanzees, sharing a common ancestor with us 7 million years ago, evolve intelligence?