Optical Illusions 1

What do you see when you look at these pictures?
Click on a picture to see it full size (then click on you web browser's back button to return to this page).

Woman or skull?	Face or piper?	One face or two?
Eskimo or Native American?	Duck or rabbit?	Which way is up?
Old woman or young woman?	Book in or book out?

Thanks to Richard W for e-mailing some of these to me.

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