> searchlights or even lasers Think about the return on investment on these: how much energy to grow and power vs. the improved food gathering. Also: would thi

> searchlights or even lasers Think about the return on investment on these: how much energy to grow and power vs. the improved food gathering. Also: would this make the creatures easier to find by predators? Galagos developed large eyes rather than sonar, true. I refer you to my other comment: > Perhaps eyes convey a general advantage, regardless of how you find food?