This has nothing to do with mathematics or sociology… well, not quite *nothing*, but you know, it isn’t really research – although it is (a) fascinating and (b) gives you an idea of what mathematicians find fascinating… anyway, I hope you find it fascinating, even if you’re not a mathematician and enjoy this story about all the reasons why it is not possible to build a building with 1,000,000,000,000 floors!

http://what-if.xkcd.com/94/

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