What is Quantum Entanglement?

Quantum Entanglement is a phenomena that describes how the measurements of spin, momentum, and position can all be same between two unique particles.

The main issue is that entanglement can only exist for brief moments because any sort of observation or change in environment can break it.

Entanglement is interesting because it can fit well into other theories as well. One example is Hawking Radiation. The very premise of the theory is that an Entangled Photon Pair is separated at the surface of a Black Hole.

How interesting would it be if humans could be entangled with each other?