Nothing in modern physics is more misread than the rule about light. The speed limit in relativity is not a universal cop chasing every effect; it is a rule that applies to objects and information moving through spacetime, not to spacetime itself. When astronomers say distant galaxies recede faster than light, they are not watching rockets break a barrier. The metric of spacetime is stretching, described by the Friedmann–Lemaître–Robertson–Walker solution, so that new distance appears between galaxies without any of them locally outrunning a photon.
Even stranger, quantum entanglement looks like a direct challenge to that same limit. Correlated outcomes click into place instantly, yet quantum field theory and the no‑signalling theorem say no message rides on that link. The joint wavefunction spans both particles as a single mathematical object; its update is nonlocal in the equation, but no controllable bit crosses space. Relativity constrains causal influence, not bare correlation. Space can swell. A wavefunction can reorganize. What stays locked is the one thing Einstein actually outlawed: faster‑than‑light communication.
