Can Time Travel Survive a Theory of Everything?

In many universes, typically those on TV shows or in movies, time travel is not much more difficult than driving downtown in any major city during rush hour. Sure, the traffic can get gnarly, but no law of physics prevents you from reaching your destination eventually.

In real life, time travel isn't so easy. In fact, it's probably impossible, a fantasy more farfetched than visiting Alice's Wonderland, finding gold at the end of a rainbow or cleansing all the hate speech off of Facebook.

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