. . . we don’t know and can’t know and never will know:
* * * *
It’s come to this sorry state with crazy modern physics:
“I don’t believe this entanglement stuff, show me.”
“Well, we can’t because if we try to show you it stops happening.”
* * * *
Entanglement is broken when the entangled particles decohere through interaction with the environment; for example, when a measurement is made.
A measurement made on either of the particles apparently collapses the state of the entire entangled system — and does so instantaneously, before any information about the measurement result could have been communicated to the other particle.
Tough luck . . . the equations say it happens, but it’s impossible to see.
(If you look away and then turn your head really, really fast … you might get a glimpse of the phenomenon. But that may be akin to the situation with Lot’s poor wife … who was turned into a pillar of salt for looking back to see the destruction of Sodom and Gomorrah.)
You can’t see it happening but theoretically you could see the results of it happening.
In August 2014, Brazilian researcher Gabriela Barreto Lemos and team were able to “take pictures” of objects using photons that had not interacted with the subjects, but were entangled with photons that did interact with such objects.
Some photons are entangled. Their locations diverge. Some are in Hightstown, some are on Mars. You use the former to get an image of Uncle Max. A friend of yours on Mars can see Uncle Max using the photons there that are entangled with your local ones.