Every Time Travel Paradox Explained (And How Physics Solves Them)

What happens if you go back in time and stop an event that caused you to build a time machine in the first place? Would reality break? Would the universe prevent the contradiction? Or would you create an entirely new timeline?
In this lecture, we explore every major time travel paradox and the leading physics-based solutions proposed by scientists. Starting with a simple spilled glass of water, we uncover how seemingly harmless changes to the past can create impossible logical loops.
Topics covered:
⏳ The Grandfather Paradox
⏳ The Predestination Paradox
⏳ The Bootstrap Paradox
⏳ Closed Timelike Curves (CTCs)
⏳ Novikov Self-Consistency Principle
⏳ Wormholes and Time Machines
⏳ Quantum Mechanics and Time Travel
⏳ The Many-Worlds Interpretation
⏳ Information Loops and Entropy
⏳ Quantum Gravity and the Nature of Time
Along the way, we'll examine famous thought experiments involving billiard balls, wormholes, self-interacting timelines, and alternate realities. We'll also explore how general relativity, thermodynamics, and quantum mechanics each approach the problem of traveling into the past.
Can you change history?
Does free will survive time travel?
Can information exist without an origin?
Would the universe force consistency, or split into new realities?
By the end of this journey, you'll understand why time travel paradoxes remain one of the deepest unsolved puzzles in modern physics—and why studying them may help reveal the true nature of spacetime itself.
If you enjoy deep dives into physics, cosmology, quantum mechanics, black holes, relativity, and the mysteries of the universe, consider subscribing for more lectures.
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Видео Every Time Travel Paradox Explained (And How Physics Solves Them) канала Think Like Feynman