How do you build a time traveling machine?

Answer 1

To make a wormhole that would serve as a time machine, you would need a massive amount of energy, a collider, and imploder, an inflator and a differentiator.

The collider would accelerate the nuclei of atoms and make them collide. When the nuclei smash into each other their protons and neutrons are pulverised, creating quark-gluton plasma. The quark-gluton plasma needs to be imploded somehow with about 10 billion joules. This would create a minute wormhole. The inflator would enlarge the wormhole by feeding it with exotic matter. Its anti-gravity would push the throat of the wormhole outwards. Then the differentiator would create a permanent time difference between the two ends. This could be done by exposing one end to intense gravity from a neutron star or spinning one mouth close to the speed of light. Then one could jump through one end, and go backwards or forwards in time.

Answer 2

It is impossible to build a machine that can travel through time.