A beginner's guide to time travel

What if time didn’t always move forward? 🕰️ In the laws of physics, many equations work just as well in reverse, suggesting that—on tiny, quantum scales—time can flow backward. But in our everyday universe, chaos always increases, locking time into a one-way journey from past to future. So while time reversal may briefly flicker at the smallest scales, entire worlds running backward remain science fiction—for now. The arrow of time still points firmly forward… and we’re riding it through the co