All the way up

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:

allthewayup

.pdf

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Answer key:

allthewayup-answers

.pdf

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