Quantum Mechanics Explained: Understanding Einstein's 'Spooky Action at a Distance'

More than a century after Einstein dismissed quantum entanglement as 'spooky action at a distance,' the phenomenon he meant to discredit has become one of the most experimentally confirmed and technologically consequential facts in science. At the subatomic scale, particles defy the classical intuitions of locality and determinism — existing in multiple states at once, and remaining mysteriously correlated across any distance. What Einstein read as an insult to reason, the universe has quietly accepted as its operating principle.