Nocturnal animals tend to have proportionally bigger eyes than humans do ... A slit pupil, with two sides that can close like a sliding door, is far better at this task, which is why so many ...

Animals with stage-three eyes can find suitable homes ... tasting, and feeling at close quarters, could play out over distance. An arms race began, and animals responded by ballooning in size ...

Nocturnal animals tend to have proportionally bigger eyes than humans do ... A slit pupil, with two sides that can close like a sliding door, is far better at this task, which is why so many ...