Time.

If you move fast enough, and I mean faster than sound and light and most things we can kind of wrap our heads around, I am told then and only then, you can "out run" time.

It's hard to explain, because it is pretty much impossible (because of our lack of the proper technology) but theoretically it is possible. Basically, if you go fast enough, you will go faster than time.
Time is also moving, but at a constant rate, that never changes, but time isn't a real thing, it is just a unit of measurement that we have created, like an inch or a kilogram. So our time line of time is always going the same "speed" so technically all we need to do is go faster than time.
Speed is already a graph of its own, it is a measurement of distance vs. time: How far do you move in a specific amount of time.

SO, let's say you travel 100 miles in 1 second (fast, I know) but you start to accelerate, so now you are going 1,000 miles in 1 second, or 100 miles in some fraction of 1 second, now you start going even faster, let's say 100,000,000 miles in 1 second, or 100 miles in an even smaller fraction of 1 second. Technically Time can go to the infinitely small, but realistically it cannot, so if you go fast enough, you will be going that 100 miles in such a small fraction of 1 second that time cannot get any smaller and we will be going faster than time!

When they send astronauts into space, inside of the astronauts' ship, is a nuclear clock, and on earth is another nuclear clock, they are both set to exactly the same time, down to an infinitely small fraction of a second. Well when the astronauts come home, the clocks are compared, and they are no longer the same exact time. The difference is very small, but it is still a difference. The astronauts' clock was a few minutes 'younger' than the clock left on earth. Since getting a space ship into space takes pretty high speeds, the astronauts travel faster than time, at least a tiny bit, enough to make a difference on the clocks!


Pretty cool shit.