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Quantum mechanics time travel indicates no grandfather paradox

•, by brian wang

Wheeler has the physics theory that positrons are electrons going backwards in time.

The early part of the talk is a lot about the many time travel stories.

Lloyd indicates that all the stories fall into either the many worlds version or the consistent history version. The consistent history version is that you cannot alter the past in ways that you know are not true.

Here is where he starts talking about his theory and the theoretical basis in more detail.

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