Blog of assorted shapes, real and imagined, by a math prof.
A digit is tiny and invisible. But we think it’s the realest thing.
Geometric and mathy things, in the tradition of Martin Gardner. The site is several years stale—see the right-hand side: the archives and games. (For further puzzles, see The Griddle.)
I mostly visit here for the cryptic crosswords directory, but the other clubs and journals linked here are also rabbitholes. I think I like this page because it is as basic as they come, but it is tremendously rich as portal. (See also: interview with the author.)
A directory that links to old New York Magazine crosswords by way of Google Books. (Also going to put this video about David Astle here—I don’t want too many crossword sections.)