Otherwise known as 'nonlocality', quantum entanglement has been decisively verified by a number of physicists since 1982.
It's a strange property in the subatomic world that Albert Einstein disparaged as "spooky action at a distance" and was one of the major reasons he so distrusted quantum mechanics.
In layman's terms it can be explained as the ability of a quantum entity such as an individual electron to influence another quantum particle instantaneously over any distance despite there being no exchange of force or energy.
This suggests that quantum particles once in contact retain a connection even when separated, so that the actions of one will always influence the other, no matter how far they get separated!
This discovery has shattered the very foundations of physics. In short it means that the world at it's most basic, exists as a complex web of interdependent relationships, forever indivisible...
The ramifications are mind blowing and infinite, especially where they apply to death and life-after-death. That is my main interest in studying this phenomenon.
If this interests you, may I suggest reading
THE FIELD By Lynne McTaggart