Is Time Travel possible? Science Shows 3 Real Ways

Time travel is a fascinating subject, especially for geeks like me because I fantasize about going back in time and making things right.

Reliving things like standing up to the bully who made my life hell in third grade.

Or asking that beautiful girl out on a date in high school that I was so terrified to even go near.

Pretty wishful fantasies, don't you think? Or are they? So, is time travel possible? Of course it is.

Into the future.

You and I are traveling in time right now.

Into the future.

And traveling into the far future also is a reality using Einstein's principle of time dilation, when you travel at high speeds or are near a really high gravity source.

If you travel at nearly the speed of light, your time could slow so much that the day for you may be 10 years on Earth.

After five days of high speed travel, you could be 50 years into the future back on Earth.

This is depicted somewhat accurately in the movie Interstellar.

What doesn't appear to be possible is travel into the past.

So if you did travel into the future, you wouldn't be able to come back to your previous time.

Time travel into the past presents paradoxes.

The most famous of which is the grandfather paradox, where a traveler goes back in time and murders his own grandfather.

This alters the course of history in a way that the traveler couldn't have been born to travel back in time to kill his grandfather.

Movies like The Terminator make this into an epic adventure.

These paradoxes cannot exist in nature, according to the Hawking Chronology Protection Conjecture, so this idea of time travel as your current self is likely not possible.

However, going back to a past version of yourself cannot be ruled out.

This means that using any technology to go back to your past would bring you back to a younger version of yourself.

But you would not know that you had traveled back in time.

The events that took place during that earlier time would play out exactly as they did before.

Now, this would not be like the movies, and it wouldn't be much fun because you would just be reliving a past that would be no different.

You would simply relive it exactly as you did before.

You could not change anything because it is already written in stone, and no information or knowledge would have traveled back with you.