About this episode
Dive into Einstein's cosmic speed limit. We'll unpack why the speed of light is invariant for all observers, why massive objects can never reach it, and how this bound protects the sequence of cause and effect in spacetime. Along the way we separate local motion from cosmic expansion, and explain why quantum entanglement can't be used for faster-than-light communication. A compact, logic-driven tour of the physics that makes reality possible.
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