The time projector is a nifty little tool for anyone interested in a places past. By recreating the placement of light particles in the area at any point in history this device will show you a real time projection of what happened in that area. Its like a security camera for the past! Just enter how long ago you want to see and, voila, your watching the past unfold. The portable version covers a smaller range, perfect for crime scenes. The two prisms on the projector are what makes it work, the bottom one tracks where the light was while the top projects photons to the correct areas. The projector is stationary though and cannot move while projecting so you better pick a good spot. Their cheap and easy to make as well since it mainly manipulates laws of the universe. Larger ones do exist but require more setup and are mainly used for jobs. A time projector, one of many neat little gadgets made by humans.