Is time travel even possible? An astrophysicist explains the science behind the science fiction - The Conversation

( November 13, 2023; The Conversation )

Description: "Scientists are trying to figure out if time travel is even theoretically possible. If it is, it looks like it would take a whole lot more knowledge and resources than humans have now to do it."

The question of whether time is reversible remains one of the biggest unresolved questions in science. If the universe follows the laws of thermodynamics, it may not be possible. The second law of thermodynamics states that things in the universe can either remain the same or become more disordered over time.

It’s a bit like saying you can’t unscramble eggs once they’ve been cooked. According to this law, the universe can never go back exactly to how it was before. Time can only go forward, like a one-way street.




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