Dr. Jeannine Mosely finishes building a level-3 Menger sponge from business cards. You can also build your own, though Dr. Mosely warns, "[a] level 4 sponge would require almost a million cards and weigh over a ton. I do not believe it could support its own weight — so a level 3 is the biggest sponge we can hope to build." (related)
posted by Blazecock Pileon on Feb 2, 2007 - 19 comments

Mengermania tracks the progress of building a level four Menger sponge out of index cards (related - level three with business cards). [via]
posted by tellurian on Jan 18, 2007 - 5 comments