If you're not familiar with Mandelbrot and fractal geometry, you should be.

Here's a wiki page about the man:
http://en.wikipedia.org/wiki/Beno%C3%AEt_Mandelbrot

Here's a picture:


Here's a video:
http://www.youtube.com/watch?v=gEw8xpb1aRA

And finally, here's a funny quote about his passing:

"RIP Benoit Mandelbrot. Thank God he wasn't murdered. It would have taken the cops forever to draw the chalk outline." --Andy Ihnatko

I didn't know he was still alive. This is sad.

IIRC, I used screen savers based on his fractal geometry.

RIP.