Click the image above to go to site. You can read online or download the whole text or get it for your kindle. Really good stuff.
OK. You might have to watch this a few times before it starts to freak you out.
Some people never see the "cube".
Some people sitting in my living room can't see the cube when it is on the coffee table in front of them, then when they watch the video on my TV, they can't believe it is the same folded up piece of paper.