Why Can They Do This? - Blog Posts

Uncharismatic Fact of the Day

Can you sleep with your eyes open? Fish can! In fact, most fish can’t close their eyes at all, as they don’t have eyelids. The only bony fish that can close its eyes are the puffer fish!

(Image: A spot-fin porcupine fish (Diodon hystrix) by Alessandro Cere)

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