Okay, about the concervation laws. What if the time traveller wouldn't just disappear. What if there will be a VERY energetic explosion triggered each time a time traveller leaves for the future?
In the receiving end some kind of apparatus would also need to be energized with high amount of energy, which would be turned into our time travelling hero... and probably also quite a lot of sound energy, heat and what have you.
Now here's a question... would this be time travelling or just... well... conservation of a life form in an energy state
