I finished watching FlashForward and the next day there's this article about quantum state.
In the series, when Dominic Monaghan's character first came out, he was explaining quantum state to a lady (they ended up sleeping together, of course). It reminded me of Michael Crichton's Timeline. I first learned about the topic (Quantum Mechanics, Parallel Universe) there and after reading I did what I always do when I don't understand something -I researched it. For some reason, I was aware of the concept but if you ask me to explain then, I wouldn't be able to.
So now, the quantum state (simply put -to be in two places at the same time) is in the news again. Being in state of "existing" and "not existing".. I'm here and I'm also not here. Mind-boggling, eh? But it really, really sounds so exciting.
FlashForward mentioned something about MWI - Many World Interpretations or Parallel Universe. According to this article in addition to the world we are aware of directly, there are many other similar worlds which exist in parallel at the same space and time. Since every possible outcome of every event defines or exists in its own "history" or "world". In layman's terms, there is a very large—perhaps infinite—number of universes, and everything that could possibly have happened in our past, but didn't, has occurred in the past of some other universe or universes.
It's tempting to say and think that every other decisions we didn't choose to make, we have already taken in some other "worlds" and has now had a different outcome. It's an interesting and a very seductive idea to think about especially if you're having a very crappy day in "this world".