you can go back in time if you travled so it said on the history channel
if you where in a space ship which could travel very fast you would pass all the planets in are solar system then you woud travel out of our galaxy
into deep inter stella space facing billions of galaxies like ours, after passing past the galaxies and black holes and pulsars and all the rest of the crip you will come across galaxies not well formed like ours and eventuially you will come the the srat off the big bang,
so if you traveled in any dirction in the sky at 20 million times the speed of light you will always end up back to the biggin off the big bang.