The Many-Worlds Interpretation

In 1957, Princeton graduate student Hugh Everett III tackled a central mystery of quantum mechanics: the measurement problem. When observed, a particle in many states seems to instantly 'choose' just one. Everett's doctoral thesis, originally titled 'Wave Mechanics Without Probability,' proposed a radical alternative. What if there was no choice and no collapse? He argued the observer was just another part of the quantum system. When you measure a particle, you don't force it into one state. Instead, you become entangled with it. The universe branches, creating separate realities where each possible outcome occurs. In one branch you see one result, while a copy of you in another branch sees something different. All possibilities are physically real.