Lets talk about Time

It goes hand in hand with speed.

If you recall back from secondary school Maths!

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But yeah, time does slow down/speed up depending on the gravitational force acting on it from a nearby body.

There's a yo momma joke here somewhere :p
 
It's not completely crazy to discuss time-travel in modern theoretical physics. For example, the Kerr solution to Einstein's field equations (representing a rotating black hole with no charge) admits closed timelike curves. Meaning that an observer in this spacetime could meet themselves in their own past!

There's a beautiful theorem of mathematical physics that tells us that any spacetime that is compact necessarily admits closed time like curves. In non-maths speak: if the spacetime describing our universe is bounded* then time-travel is possible, and in some sense inevitable.

* and contains its limit points
 
As people have said time travel (using time dilation) is possible.If i remeber my A level physics enough it is only really make much of a difference when you reach 80% the speed of light. But in the 70s some scientists did it atomic clocks and commercial airliners linky. And time is personal, so for example if you could sit on a ray of light travelling through a vacuum at 3x10^8 m/s light would still travel away from you in all directions as 3x10^8 m/s
 
Congratulations on the worst use of the "tag" system ever. That's 3 seconds of my life I'll never get back.

Time waster :p
 
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