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Imperfect alignment can lead to interesting patterns.
What you see is often affected by what you expect to see.
See pictures in thin air.
Gelatin can do much more than just wiggle and jiggle.
There’s more to seeing than meets the eye.
Why is the sky blue? That's a sticky question.
Now you see it; now you don’t—an object without a sharp edge can fade from your view.
What happens when you get off the merry-go-round?
"Cold" metal and "warm" wood may be the same temperature.
Give a light source the raspberry and watch it wiggle.
Air trapped between two pieces of clear plastic produces rainbow-colored interference patterns.