http://en.wikipedia.org/wiki/Menger_sponge Menger sponges for the uninformed.
http://www.theiff.org/oexhibits/menger02.html A Menger sponge made of business cards.
http://www.lswilson.ca/warstories.htm Stories from veterans of DEW Line outposts, Cold War radar stations in the far north of Canada.
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