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11 months agoThe one I bumped into recently: the Coastline Paradox
“The coastline paradox is the counterintuitive observation that the coastline of a landmass does not have a well-defined length. This results from the fractal curve–like properties of coastlines; i.e., the fact that a coastline typically has a fractal dimension.”
It might not be exactly what you’re looking for, and it’s no where as good a movie as Chinatown, but “Beneath the Planet of the Apes” (https://www.imdb.com/title/tt0065462) definitely ends on a very “down” note. I saw it for the first time a few weeks ago and was kind of blown away by the ending.