7 ms·
>Since a cause cannot have an effect in the past, all causes have effects in the future, be it one nanosecond in the future or one thousand years in the future.
by JD557 7y ago
>Since a cause cannot have an effect in the past, all causes have effects in the future, be it one nanosecond in the future or one thousand years in the future.
Off-topic, but you might enjoy reading about the delayed-choice quantum eraser experiment [1].
According to Wikipedia: "While delayed-choice experiments have confirmed the seeming ability of measurements made on photons in the present to alter events occurring in the past, this requires a non-standard view of quantum mechanics.", but it's still a mind-bending result.
1: https://en.m.wikipedia.org/wiki/Delayed-choice_quantum_eraser https://en.m.wikipedia.org/wiki/Delayed-choice_quantum_erase...