Top Ten Things That Sound Impossible But Are Not

It's a lot simpler than that. Time travel can be done simply by moving relative to something else, or being under influence of gravity. Which we have upon us all of the time.

I think Time Travel to the past is going to take a many centuries yet, maybe aliens could do it.

The problem is, how to time travel into the past. That's one big hurdle.

Many of the seemingly science fiction things are allowed by quantum physics as it is physics based on probability. That's why in the beginning, quantum physics was something physics couldn't readily digest. As for now, almost everything is accepted.

This is impossible, becauce nothing can move faster, than light!
And teleportation is faster. This is primiral physics, m8s! Stop making dumb comments!

It may be possible to build, but it would cost like 800 quadrillion (yes, it's a real amount) dollars to build