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(via PBS Space Time) Does quantum mechanics allow the future to retroactively influence the past, as in the infamous delayed choice quantum eraser experiment? How about we get an actual quantum ...

In 2023, researchers revisited the Quantum Eraser experiment with updated technology and disturbing results. Evidence suggests that observation and measurement might alter the past. Such findings have ...

In the late 1970s, legendary physicist John Wheeler proposed a radical question: Exactly when does the universe notice that we're paying attention to a quantum experiment? And does it really matter?