Planck scale Memes

Physics' greatest unsolved mystery in dinosaur form! General relativity describes gravity on cosmic scales beautifully, while quantum mechanics nails atomic behavior perfectly. But try to make them work together at the Planck scale (super tiny distances where quantum gravity should exist), and they completely ignore each other like exes at a party. Physicists have spent decades trying to get these theoretical divas to collaborate, but they're still giving each other the silent treatment. String theory, loop quantum gravity—we've tried everything short of relationship counseling for equations!