I remember reading about experiment with monkeys in somewhere between 60's and 70's if I remember correctly. It was performed on two separate islands, which had no connection with each other and the distance between them were like 20,000 km (or more). The thing is, on the 1st island monkeys were given potatoes. After some time, several of them noticed that if you wash them, potatoes become tastier. It took several year I guess (I can hardly remember the details now) and all the monkeys learned the technique to wash potatoes. Now this is where things get interesting. As I said, there was no connection between those two islands, there were only observation devices on the second one, which were checked once a year (again, can't remember correctly), but the monkeys which lived on the second island learned the same thing at the same time, to wash potatoes that is. Later, scientists made a hipothesis that if specific number of individuals of the same race (it can be 100, 1000 or even more) learns one thing, the remaining ones can obtain the same knowledge unconciously. That, my friends, is called collective consciousness. I know that it sounds like science fiction, but if some say that there is an infinite number of parallel worlds, then doesn't it mean that this can be reality, which we still can not comprehend?