Is time travel possible?

One of the big questions of life is, will we ever time travel?

Technically, we already time travel at a rate of 1 hour per hour. But, most interest in in whether we can time travel to the past of at a faster rate to the future, and return back to the present, like in multimedia from popular culture (Doctor Who, and Back to the Future), but, scientists say that this may not be possible. Taking into account a notion, created by Albert Einstein, called Special Relativity. This theory says that space and time are really aspects of the same thing which is space-time. There's a speed limit of 300,000 kilometers per second for anything that travels through space-time, and light always travels the speed limit through empty space. Special Relativity also says that a surprising thing happens when you move through space-time, especially when your speed relative to other objects is close to the speed of light. Time goes slower for you than for the people you left behind. You won't notice this effect until you return to those stationary people. For example, if you were 15 years old when you left Earth in a spacecraft traveling at about 3/4 of the speed of light, which is much faster than we can achieve now, and celebrated only five birthdays during your space voyage. When you get home at the age of 20, you would find that all your classmates were 65 years old. Because time passed more slowly for you, you will have experienced only five years of life, while your classmates will have experienced a full 50 years.

From some essay I did ages ago. Meh.

What

Tl;dr we can't time travel to the past or further into the future.

What