Image source. (Fair warning, many image source links will be spoilers.)
This theme is a bit smaller than some others on this site, but I think it's still a satisfying payoff, especially since I couldn't believe my luck how well the revealer fit into the puzzle.
I actually sent this puzzle to the Nobel winner the phenomenon is named after, but I haven't heard back. If you're reading this, 18-Across, it's never too late to write back...
PDF:
Answer key:
Online:
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