i suggest everyone watch this movie on netflix
its kinda slow, boring and repititive but one study/experiment stood out in the middle of the movie
basically they had to people in two seperate contained areas and they were told to meditate or focus on one subject or thing in there minds
well one of the people in the contained area was given a series of light flashes wich effect the brain, while the other person in the other room was just in silence
well they studied the the brain impulses and they had practically identicle brain impulses , proving that there was some sort of shared consciousness