Why Do Shapes Appear When You Squint at the Sky?

Squinting makes things look blurry, like a fuzzy picture. When you squint at the sky, the clouds become that fuzzy picture, and your brain tries to find shapes in it, just like when you play connect-the-dots.

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Examples

Squint at your breakfast cereal and see an elephant.
Look at a tree from far away and imagine it's a dragon.
Peek between your fingers and watch the sky turn into a spaceship.

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Categories: Math · optics· geometry· perception· clouds· math in nature