Have you met the hexaflexagon? If not, it's high time you did.

Last week, YouTube's resident mathematical mind-blower, Vi Hart, introduced many of us to the topological wonder that is the hexaflexagon. If you haven't seen it yet, get your life in order and go check it out. In fact, even if you have seen it, go ahead and watch it again. Then reconvene with us here for round two of … » 10/08/12 8:20am 10/08/12 8:20am