Early mammals evolved in a burst during the Jurassic period,adapting a nocturnal lifestyle when dinosaurs were the dominant daytime predator. How these early mammals evolved night vision to find food and survive has been a mystery, but a unique study publishing June 20 in Developmental Cell suggests that rods in the mammalian eye, or extremely sensitive to light,developed from color-detecting cone cells during this time to give mammals an edge in low-light conditions.
Source: phys.org