Question: Could time travel ever be possible, like in doctor who?

James Munro answered on 14 Mar 2019:

Hey tardis,

I see the inspiration for your name :). Time travel is possible already in theory – sort of. Obviously we travel forward in time, but as far as we know it is impossible to travel back in time. We can, however, slow time down like in the film Interstellar. The faster people move, the slower time moves relative to them. So if you travelled as fast as you can go (which is just below light speed) you would seem to age much slower than people still walking around on earth. So if you did a big loop in the tardis at near lightspeed – travelling around the galaxy and back to earth – you would just be a few minutes older while everyone on earth would be hundreds of years older (so probably, not alive!).

That is all possible if we had a fast enough spaceship. I hope that helps 🙂

Oh, there is a lot we do not know. We think wormholes might help us travel in time and space – but those are all theoretical as we have never found one. Look them up, they’re cool!