Out of interest there is a great documentary on the man himself and the maths behind fractal geometries on SBS as I type this. It's titled "Hunting the Hidden Dimensions" and it started at 9.30 AEST.
...I hate to admit I watched a doco on mathematics, but it was a much better explanation than Wikipedia.
I was too young in ther 70's to remember any of those shirts in the doco, but I will check my dad's wardrobe next time I see him.