Time and Causality

3 sessions, in order

Three sessions on why time only runs one direction. First, what causality actually requires, and why physics is stricter about it than everyday language is. Then, the strange fact that looking farther into space means looking further into the past, because light takes time to arrive. And last, the real reason you can't unscramble an egg: not a law forbidding it, just overwhelming odds against it. Entropy turns out to be the thing quietly pointing time's arrow forward.