Add Yahoo as a preferred source to see more of our stories on Google. Cats are full of little mysteries that make them perpetually fascinating to us, and one of the most interesting things about them ...

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 ...

(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, ...

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Cats are full of little mysteries that make them perpetually fascinating to us, and one of the most interesting things about them is their eyes. They come in a variety of incredible colors and ...