So if we have natural fractals, then basically any shape taken in nature, any tree,river or land mass could be given as the challenge image. If I read that site correct. Maybe that's not such a challenge. Who will have to be the one to decide if it is indeed a fractal? I would see a snowflake being one, or the swirls on funghi.Perhaps ice crystal shapes. Ok just a few cents worth. I guess the idea of an i-frame did not work here. I figured everyone might put the replies in the inset. Kind of though it was a good idea to keep it up front, but then have comments contained in one thread.

"The happiness of a man in this life does not consist in the absence but in the mastery of his passions."