Here's a few mindbenders to keep the old grey matter ticking over.

http://www.scientificpsychic.com/graphics/

http://www.exploratorium.edu/seeing/exhibits/changing.html

http://www.exploratorium.edu/seeing/exhibi...sappearing.html

Interesting.

Thanks, that's fun.

I've seen some of these before... Pretty fun.. Reminds me of that pic they show you when you are a kid, of the old woman in a shawl/beautiful young girl.

Nice.. thanks for sharing