Can we change the past? It would seem to be obvious that this is not possible - once an event happens it is part of history and cannot be altered in anyway. Even in the most speculative theories on time travel there are usually strict restrictions on what is possible.
But today's article is not on time travel, but rather it is on the mysterious quantum effect known as
a quantum eraser, and how experiments in this field have suggested that on small scales, the future really can affect the past...
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I am a theoretical physicist & mathematician, with training in electronics, programming, robotics, and a number of other related fields.
