To be honest, I think it's better to be focused on traveling around the world instead of time-traveling. It's real, after all, and discovering other countries may feel like time-travel. After visiting India, I took a trip to Montreal, and it felt incredible. Moreover, I discovered food tours from [secretfoodtours.com] , and it improved my trip a lot, local cuisine is actually outstanding.

Yes, it exists in one direction at least, and we all do it all the time - travelling into the future at the rate of one second every second.

As stated before traveling in to the future is possible. We already have reliable data that gravity can affect time to the point that time passes slower at the equator than at poles of the planet and passes even slower in microgravity environments, i.e. space. So theoretically if one could manipulate gravity wether through approaching light speed or by using an already existing gravity source, like a black hole you could travel forward in time. The main problem here is simply that humans are frail and most likely wouldn't survive these methods. But I'm sure someone could come up with some use for it. Perhaps slowing radioactive decay or something.

Theoretically, it could be possible, but is extremely unlikely. No, I do not believe that time travel has ever occurred.