Quantum physics gets real weird real fast, and one idea gaining more currency of late is the concept of quantum retrocausality, where a decision made in our experience of the present may influence what we experience as the past.
These aren't a bunch of Time Cube type cranks, either. From a helpful overview by Lisa Zyga:
First, to clarify what retrocausality is and isn't: It does not mean that signals can be communicated from the future to the past—such signaling would be forbidden even in a retrocausal theory due to thermodynamic reasons. Instead, retrocausality means that, when an experimenter chooses the measurement setting with which to measure a particle, that decision can influence the properties of that particle (or another particle) in the past, even before the experimenter made their choice. In other words, a decision made in the present can influence something in the past.
Huw Price has done some great introductory lectures like this on the concept:
https://www.youtube.com/watch?v=_y1ORyC344E
• WTF is Quantum Retrocausality? (YouTube / Seeker)
