If one does exist, where are all the tourists?

Cynics often point out that if time travel was really possible, we would have been visited by people from the future.

It is not possible to move backwards in time. Period. Even if we could, hypothetically, there are risks in doing so. Quite apart from dealing with annoying tourists slumming in the past.

You can travel to the future, theoretically, but the technology isn't there yet. If you managed to build a vehicle that could travel at a relatively high percentage of C, over a suitably long period of time, looping out from the earth and returning to it, you would arrive in the future. Bon voyage.


However, Einstein's laws of physics suggest that time travel is only possible into the past as far as the point when the first time machine was invented.

If you believe on it, Time travel could be a reality within just three months, Russian mathematicians have claimed.

They believe an experiment nuclear scientists plan to c ...more