“Many of the ideas of science fiction, like submarines and travel to the moon, have become matters of science fact…it is possible to travel to the future. That is, relativity shows that it is possible to create a time machine that will jump you forward in time. You step into the time machine, wait, step out, and find that much more time has passed on the earth than has passed for you. We do not have the technology today to do this, but it is just a matter of engineering: we know it can be done.”
— Stephen Hawking A Briefer History of Time