Affecting The Past From The Present is Possible! Let Me Explain Why |⚛

If you watched my 10th video, on time travel, which really isn't needed to understand this one, I mentioned you can't travel back in time, but you can change things in the past that haven't been determined yet. This was done through an experiment known as the delayed-choice quantum eraser. A lot of people like to call this changing the past!

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Diagrams all derived from this one by Patrick Edwin Moran.
https://commons.wikimedia.org/wiki/File:Kim_EtAl_Quantum_Eraser.svg