International System Of Arbitrary Decisions

The crushing disappointment when you discover that your beloved SI units aren't actually based on universal constants but are just as made-up as imperial measurements! That adventurer spent 15 years searching for the ultimate measurement truth only to find out we're all just playing a cosmic game of "let's agree these numbers make sense." The meter was originally defined as 1/10,000,000 of the distance from the North Pole to the equator—which is basically saying "we picked a random fraction of an arbitrarily-sized planet." Even with modern redefinitions using light and quantum mechanics, we're still just picking convenient reference points. Metric zealots in shambles right now.