Are we able to get into a time machine and visit our great grandparents? Or meet Albert Einstein as a child? Maybe it is only possible to travel to the future, to watch the last days of the earth. Or see the sun burn up and our Milky way get destroyed.
These are questions that cannot be answered. Time travel is not possible today, but will it ever be? If we could one day travel back in time, would we go back to today? There have been no encounters recorded of people from the future, however, these could be kept hidden. Travelling back in time might never be possible, there are risks to time travel back in time that could make it impossible. A paradox could happen if we were to travel back in time and kill the younger version of yourself. I don’t believe that travelling back in time will ever be possible. Although speed could help us try to travel back in time, I think that it is ultimately not possible to physically travel back in time.
Could we travel to the future? We haven’t invented a time machine yet, but if we did, travelling to the future seems more likely than back. We could orbit a shuttle of people around a black hole, here the time passes very slowly and therefore, when they come back years later, the amount of years passed on earth is greater than they experienced. This is because of the effect gravity has on large objects. It can be done on earth, but not thing has a mass so great to really have an effect on time. Therefore, I think that it will not necessary be possible to travel to the future, but waiting in a slower time zone to later emerge and be younger can happen.