How To Build A Time Machine?

Answer 1

You need to look at the misconception that time is a dimension, and that traveling its length is even possible. Though often described as such, it is not a dimension. It is a descriptive attribute, like a pound, or velocity, or a color. Time is simply a description of comparative change, for without comparative change between two objects, there is no such thing as time: whether it is comparing the rate of molecule decay, or the comparative change of chemical reactions. In an absolute pure vacuum - time does not exist. And since time is not a constant - it cannot be a dimension.

To qualify as a dimension, the dimension has to exist in the same space and time as all of the other dimensions. Meaning it must always be present, and therefore, a constant. The dimensions are length, width, breadth, and energy. Why energy? because it is always present in all physical objects, occupying the same space and time as all the other dimensions. Various frequencies of energy may in themselves be additional dimensions.

To address the issue of time travel: to reverse time-you would have to know the pre-existing condition of every molecular and chemical reaction in the universe, and somehow reverse them all, simultaneously, to their previous positions and states.

Meaning: you would also have to be restored. So, you would never know about the future, and never realize you have traveled back in time. Leaving the times and events to replay themselves back out exactly as they did before... So, what would be the point?

If you travel back in time to kill your own grandfather... 1) you would never know it... 2) History has already shown us what happened - since you're being in the past has always been the way it originally happened - making you part of the original, and only, timeline - we know you fail in your attempt. 3) If you popped backwards a few decades - the Earth would not be here for you to land upon. It would be 100's of light years back in its orbit around the Milkyway Galaxy. So, until you can travel 100's of light years in the blink of an eye - there would be no point in time travel...

A few points SciFi overlooks when writing movies and novels...

Now, if you wished to go on a one way trip to the future - you simply need to find a way to enter a form of biological suspended animation for the appropriate time period. When you awaken, you will be in the future, and it will have appeared, from you relative position, that it occurred instantly...

Answer 2

You do not; time machines are a logical impossibility.

Answer 3

You cannot. A time machine or time travel would violate practically every natural law.
It is a useful literary device in Science Fiction but nothing more.