These are unreal hyper-dimensional and 8-sided dice, it might be very exciting to play with this Dice with new rules.

Photography is truly an art in itself, Photography is truly an art in itself whole dimension. This trick is an interesting illusion that confuses our eyes to believe something which is actually not true.

Watch the Video here
This is quite a well known illusion. Basically, a hollow mould taken from a face actually appears to be a three dimensional convex face, even though it is actually concave.

Tim has got hold of this amazing hollow face of Richard Gregory, Professor of Illusions at Bristol University, which he demonstrates in the video. It is twice life size, and has been painted as well.

The Hollow Face Illusion is also demonstrated in the Einstein Mask, and also by the Dragon Illusion.

This optical illusion has been created in three dimensions. It is a real object. However impossible things seem to happen! The wooden balls seem to roll uphill. It cannot be magnets - they do not work on wood! This wonderful illusion was created by Koukichi Sugihara from the Meiji Institute for Advanced Study of Mathematical Sciences in Japan. In May 2010 this video was the winner of the Best Visual Illusion of the Year Contest 2010.

However once the structure rotates, we can see that it is not constructed as we initially thought. We might have thought that the wooden balls were rolling uphill. Once we view it from the other side, we can see that in fact the balls are rolling downhill, and that the laws of physics are still being obeyed.

In closing out this week's series, it is interesting to consider illusions. Seeing things that are not really there. Like this medievil flooring, clearly laid in two-dimensions but with colors and contrasts that give it a three-dimensional appearance.

Well, now that we know the trick, it is clear, right? And we would never make the mistake again, right? Ha. We are more easily fooled than that, and every day.

For example, we have a full moon tonight. If you have clear skies, get outside tonight and watch the moon rise over the horizon. It's an enormous orb as it clears the tree line. Come back in a few hours and look up to see how much smaller it has become. Why? Just another optical illusion dealing with relative size comparisons. You can thank your mind.

And while you are looking up at the night sky, notice both the large number of stars, and the vastness of space that separates each star. Now consider your own body, or that rock on the ground. Solid and dense, right? Actually, we also are mostly "empty space" if we consider the fundamental building blocks that constitute our physical nature.

But then, that also depends upon the lens with which we examine life. Are we looking at particles or waves? Energy or matter? As you probably know from introductory physics, they are just different manifestations of the same thing. So in a large degree, what we see "out there" really is just an illusion -- made to look real to our senses.

Just like the clever use of color and contrast in the mosaic on the floors surrounding the Taj Mahal to create an illusion to our eyes. So it is that much that we see as "real" in this world, is really just an illusion to our senses.

You may find it useful to question that which you experience as "real", "absolute", "fixed", or "truth". Or you may be happier just accepting what your senses tell you about the world. Personally, I enjoy them both -- the beauty my senses take in, and the beautiful enigma which lies behind it all.

Three-dimensional windows.