posted
Is it possible to go back in time and change an event, that has already happened, into a different event?
Remember the movie "Groundhog Day" that had the actor Bill Murray relive and play back the past with some alteration each time.
This can be done with sub-atomic particles manifesting as either a wave or particle, and acting differently each way, depending on how you measure/observe it.
However, you can change its past by changing the observation/measurement of it - the quantum erasure.
Reality, as we materially experience it, is an illusion created by our perception.