Neil deGrasse Tyson - Can We Go Back in Time Using a SpaceTime Machine? https://www.youtube.com/watch?v=yI9IL9pNcpg
Does the Past Still Exist? https://www.youtube.com/watch?v=GwzN5YwMzv0
The Universe As You Know It Does Not Exist https://www.youtube.com/watch?v=WzC92VJJnvg
The universe is a collection of expanding energy and data and is real in some context. When cosmic data is perceived and linked with the concept of time, another level of information can be observed. The concept of Time+Travel is quite fascinating and has astounding implications about the nature of reality.
https://en.wikipedia.org/wiki/Temporal_paradox#Types
https://www.space.com/grandfather-paradox.html
https://www.livescience.com/grandfather-paradox
https://www.discovermagazine.com/the-sciences/what-is-the-grandfather-paradox-of-time-travel
What is the Grandfather Paradox? | Neil deGrasse Tyson Explains https://www.youtube.com/watch?v=baUSaFx8M1o
Can Particles be Quantum Entangled Across Time? https://www.youtube.com/watch?v=twY2q1F-ciI
https://thedigitallabyrinth.blogspot.com/search?q=Space+and+Time+Travel