Add Yahoo as a preferred source to see more of our stories on Google. "It's still unclear what the potential benefits [or] purposes of different pupil shapes might be," Bell told Snopes, referring our ...

It's easy to think of pupils as simple holes that widen in the dark and shrink in the light. But if you look across the animal kingdom, you'll see a variety of pupil shapes: vertical slits in cats and ...

Hello all, it’s Manasee Wagh, service and news editor at PopMech. Years ago, I had a cat named Cyrus. I used to stare at him staring at me, and wonder what he was thinking. He had beautiful gold-green ...

(via TEDEd) Peering into the eyes of different animals, you’ll see some extraordinarily shaped pupils. House cats, for one, are twilight hunters with vertically elongated pupils. Many grazing animals, ...