According to Wikipedia, the first commercial jigsaw puzzles were marketed in England by John Spilsbury in 1760.
I haven't been putting them together for nearly that long. Every Christmas we buy a jigsaw puzzle and try to assemble it before the end of the holidays. Ms. Sandwalk usually gives up after the first day.
Do you know what "tessellation" means?
That is a huge puzzle. I bet IDiots couldn't do it!
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