When will you have a time machine?

Answer 1

Well, it's impossible to go back in time, due to the fact of the grandfather paradox, which says "If I go back in time and kill my grandfather, my father would never be born, but then I wouldn't be, so how could I kill my grandfather?" The universe protects the past, however, you can jump through dimensions where you can kill anyone or anything with no effect whatsoever, it'll just be like visiting an Earth with slightly different rules, such as a new species of animal could be the smartest. Like in Planet of the Apes. But it is possible to travel FORWARD in time, here's how:

The universe has a speed limit, the speed of light, the way it works is that if anything approached it it would be immediately slowed down, so if a train went the speed of light around the earth, the universe would slow it down so the Earth would continue as usual, but the people on the train are slowed so 5 days on the train could be 100 years off of it.