What I thought of

They did a test with the plane that goes mach 3 and put the worlds most actuate clock on the plane and one on the ground. They flew for a set about of time up there at those speeds and when they came down to earth the clock was something like 7 seconds behind.

On earth it woul dhave taken 1000's of years for that clock to lose time. Makes you think.

I do think however we give humans way to much credit. just about everything with touch we ruin, if the earth was in perfect balance before humans got here then we've totally screwed this up. Unless of course in our imbalance we're doing exactly what we should do and maybe this is a cycle.

HOwever, if time travel was possible alot of people in the furture would come back and they'd start popping up.

It's interesting, however remember that time is only a perspective and thats why it seems to slow down and speed up. 'Time flies when you're having fun'