Time travel has long been a staple of science fiction. Can it really happen? Who knows?
What if it was possible to send information back in time? They are doing experiments to see if that's possible (at least according to the episode I saw of Through the Wormhole). But in my mind, I took it one step further.
What do you think you'd do if you got a message from your future self? Would you believe it? Would you act on it?