Entanglement is a phenomenon in which two quantum particles interact in such a way that they appear to share the same existence. This means that the measurement of one particle influences the second particle immediately, no matter how far away they happen to be from each other. In this respect, the quantum state of each particle cannot be described independently of the others.
For a long time, scientists have disputed its existence. But with today’s technology, and well equipped labs, physicists can study this phenomenon in more detail, and hopefully answer these questions.