Time Travel Conundrum
Neil and Janna discuss the complexities of time travel, exploring the idea of altering the future by going back in time. They touch on the laws of physics and the concept of wormholes as shortcuts through space and time.In this clip
From this podcast

StarTalk Radio
Relativity Round-Up With Janna Levin
Related Questions
Are wormholes mathematically possible according to the episode Multiverses & Wormholes with Brian Cox & Neil deGrasse Tyson – Cosmic Queries and the clip Time Travel Theories?
Are wormholes mathematically possible according to the episode Multiverses & Wormholes with Brian Cox & Neil deGrasse Tyson – Cosmic Queries and the clip Time Travel Theories?
Can wormholes allow travel between different universes as discussed in the episode 512: Michio Kaku | The Quest for a Theory of Everything and the clip Wormholes and Time Travel?