[B]ees actually make circular cells ... the Bonsma-Fishers approximated each puzzle piece as a “circle” to be packed onto the area of a table. Puzzle pieces aren’t circular—how maddening ...

As avid puzzlers know full well, the humble jigsaw puzzle is a thing of ... but extends into a good-sized table with fold-out legs and a felt covering to make it easy to pick up and push in ...