machine project - The Business Card Menger Sponge

Totally awesome. I love the raw obsessive dedication that it takes to complete one of these projects.
"Menger’s Sponge - named for its inventor Karl Menger and sometimes wrongly called Sierpinski’s Sponge – was the first three dimensional fractal that mathematicians became aware of. In 1995 Dr Jeannine Mosely, a software engineer, set out to build a level 3 Menger Sponge from business cards. After 9 years of effort, involving hundreds of folders all over America, the Business Card Menger Sponge was completed. The resulting object is comprised of 66,048 cards folded into 8000 interlinked sub-cubes, with the entire surface paneled to reveal the Level 2 and Level 3 fractal iterations."
machine project