http://calvindude.com/dude/blog/2007/07/the-fractal-challenge-to-homology/
From the page: “I am the first person to acknowledge that I am somewhat strange. One of the things that I enjoy doing is looking at patterns. For instance, when I walk down the sidewalk I look for patterns in the cracks in the cement, in the twigs that fall from trees, in shadows, etc. These patterns have one overall thing in common: they are fractal shapes.”