Spinning dance optical illusion  OCT 11 2007

I've been obsessing over this optical illusion ever since I ran across it yesterday.

Spinner

Is she spinning clockwise or counterclockwise? Or both...and how is that even possible? It's a left-brain vs. right-brain test...which way she spins for you determines which side of your brain is more dominant. (Tip: if you're having trouble getting her to switch directions, focus on a point a couple of inches below her feet...that seems to do it for me.)

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