I'm going to be completely honest, I would go back to when Steve Irwin was killed, and tell him to avoid swimming over the stingray. Steve was a role model for me, a herpetologist in training, so seeing him alive would make me a lot more determined.
Or take a gun with me and kill hitler-
You cannot travel back in time.
If a particle were sent back in time, it could potentially cause paradoxes and disrupt the natural flow of events. The consequences of time travel are not fully understood and could have unpredictable effects on the timeline.
A DeLorean
No. First of all you could not. But if you could, then time would stand still, not backwards.
One: Using curved space time once could end up back before you started. Two: Using a pair of worm holes you could travel in time. Three: Exceeding the speed of light would allow for time travel. All three run afoul of Causation unless a new reality is formed.
A vacum
Who wouldn't want to time travel?! See: Doctor Who.
Not voice. As the voice is the mechanical sound it would get absorbed totally by the air medium. But the thoughts would travel with time and that could be caught back later.
not yet if there was you wouldn't want to mess with the past. you could mess somthing up. even if it would benafit man-kind. say you went back in time. and you stop 911 from happening? what would the effect be on the pesrent day? would we have gone to war? would Obama be president? all the answers in the world. could not solve what you would be looking for. now if you travel to the future and find out they make flying cars and what not. you could stumble across a rift that yet has to be formed plus.... we don't have the tech to make a 500M kilawatt hyper drive to travel in time... but we will one day.... or by the year... 5161.... i think.... but the answer to ur search is no there are no time travel machines.
aparently if you taravle the opisite way the earth spins at the speek of light time travle is possible ______________________ It is most unlikely that any practical method of time travel, or of communicating with the past will ever be discovered. Scientists sometimes use what is called a "thought experiment" to determine if things are possible or impossible. In the time travel thought experiment, lets imagine what might happen if it were possible to go back in time. If you return to a previous point in time, AND if you could change events, then you might do something that would cause you to have never invented time travel at all. If anyone else could invent a time travel machine, then THEY could do things to prevent anyone from inventing time travel. So the only options that lead to a "stable" time line and our history is that time travel is impossible, or is never invented. But it is nice to dream about!
The Grandfather paradox has to do with time. Assuming you could travel back in time, if you kill your own grandfather before you were born, you wouldn't be alive to go back in time to kill your grandfather.Thismeans, logically, that time travel, backwards in time,could be impossible.
you can't travil back in time