Morning Overview on MSN
Why animal pupils vary, from vertical slits to horizontal bars?
A domestic cat’s eye narrows to a razor-thin vertical slit in bright sunlight, while a grazing sheep stares out through a wide horizontal bar. These are not cosmetic quirks. A 2015 study in Science ...
Live Science on MSN
Why do animals have different pupil shapes?
Pupil shapes vary widely across the animal kingdom, from the W-shaped pupils of cuttlefish to the bar-like pupils of goats. But why are animal pupils shaped so differently?
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