Weekend Open Thread Celebrates October, Which Is Hexaflexagon Month


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This will boggle your brain:

Part 2 apparently is due to arrive next week.  Meanwhile, this here is your Weekend Open Thread.  Talk about whatever you’d like, within reason and bounds of taste!

Illustration from Wikipedia page on construction one of these confounded contraptions:

 

UPDATE: A notable death this weekend, though he sure seemed to have had a good life.  There’ll be no more candles on his birthday cake.