Commentary by cpressey on 4-Dimensional Space works
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### Strange Horizons - Spirits, Art, and the Fourth Dimension By Bryan Clair


### Notes on the Fourth Dimension -- The Public Domain Review


### Acme Klein Bottle

I'm impressed that this site is still up in 2024.

### Welcome - Hypercubing

Looks like a reasonably comprehensive resource on hypercubing,
the activity of solving geometric-combinatorial (like Rubik's cube)
puzzles in 4 (or higher) dimensions.