Quantum Entanglement Is Real, Not Science Fiction

Quantum entanglement — where two particles become correlated so that measuring one instantly affects the other, regardless of distance — was confirmed experimentally by Alain Aspect in 1982 and is now routinely used in quantum cryptography. Einstein called it "spooky action at a distance" and didn't believe it was real. He was wrong.

Source: Physical Review Letters — Alain Aspect (1982)