That answers my question. :smile:
Thank you... and sorry for not expressing myself well enough as English is not my native language.
Thank you, phinds.
What I understand from your post is that we are making some kind of a thought experiment in which we imagine the non existence of time so we can say that we can move back in space (move back to the same point we started moving from).
My confusion is about the concept of space-time continuum...
so he is not talking "seriously" in a sense.. I mean, you can't separate time from space unless you are going at the speed of light and it's only then that time stops.
so why don't we consider that moving BACK in space is exactly like moving BACK in time?
Edit:
by my last question i mean that...
Watch from 34:50 till Joseph Lykken speaks.
"In space I can go from New York to Chicago and then I can change my mind and go from Chicago to New York", he said.
I don't understand how that means moving back in space...Everything is moving, the Earth is moving, the galaxy, the universe...