What Bell tests changed
Experiments testing Bell inequalities show that quantum correlations cannot be reproduced by a broad class of local hidden-variable theories. Modern loophole-free experiments make that conclusion especially strong.
Why it looks instantaneous
Measurements on entangled systems show linked statistical outcomes even at large separation. But each local result is individually unpredictable, so one observer cannot choose a result that encodes a message for the other.
The no-signalling boundary
To reveal the correlation, observers must later compare their data using ordinary classical communication, which remains limited by the speed of light. Quantum teleportation has the same requirement.
Why the result is still profound
Quantum theory violates classical intuitions about separability without providing a usable superluminal telegraph. That is stranger than a hidden message racing between particles—and experimentally better supported.
Research record
Nature (2015) — loophole-free Bell inequality violationPeer-reviewed · open sourceNobel Prize in Physics 2022 — entanglement experimentsNobel Prize · open sourceDoes Quantum Entanglement Send Information Faster Than Light?
Direct answer: No. Entanglement produces non-classical correlations, but it cannot be used to send controllable information faster than light.
Quantum nonlocality is real; faster-than-light communication is not demonstrated.