BLAST FROM THE PAST DEPT.: This recent talk of ambigrams dredged up memories of a crossword I put together for Scientific American in 2006. It was written before I dabbled in ambigrams, so I hadn’t thought of it in those terms, but that’s what it is.
Sciam‘s website still has it up [CLICK HERE]. Since the crossword appeared on two pages, the grid (“blank puzzle” is how its described) and clues are on separate PDFs.
TIP: Download the PDFs (using the arrow icon in the upper right) rather than printing directly from the site. When I printed directly, the image didn’t rotate and ended up getting cropped.