Here's a new, spur-of-the-moment way to travel backwards or forwards in time! All you need are lasers and a supercomputer. You have this room, with microscopic lasers covering every inch of the room. Now, the lasers are connected to the computer. The computer analyzes what's in the room (by using the lasers to reflect off of everything, and survey every single electron or proton or whatever), and then stores the data in its memory banks. Now... say for simplicity's sake that there was just an electron moving in the room. The computer has its position and velocity stored. It then 'jumps' back a step, by simply Newtonian physics, to find where the electron was one microsecond ago. THen another... then another... You could potentially span years with the computer on this single electron. (In the full room case) the computer has 'gotten back' to 1800, say. (In its memory, of course.) It then projects all the simulated atoms and everything, into a hologram so that you can actually see the past! And the same thing could even be applied to the future, if you wanted too! Can you tell me your comments? I'm trying to build such an apparatus, at first it'll only span one foot. It's nifty!