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Menger sponge built from Post-It notes

Nicholas Rougeux is building an approximation of a Menger sponge, a 3-D fractal shape with no volume and infinite surface area, out of Post-It notes.

Menger sponge Post It

It looks about 90% complete…but as a Menger sponge, can you ever really call it finished? (thx, zach)