Time travel

The thought of being able to record our surroundings being able to reconstruct or turn back the clock and see what the looked like before we first saw them is amazing to say the least. First of all it would be a great teaching aid in classrooms worldwide o be able to actually take your class to the location your studying and precieve it in three dimensions. I believe this program would also be very beneficial to historians in that you could see exactly how and what happened to an area and how it became what is it today. I think the most interesting thing of all is the implications such as a "holo deck", although this would not just be having to record three dimentional objects but be able to project hem inside a room and actually make these things solid objects.