Is there such thing as time travel?

From a Quora post October 2015

Time travel is not possible because there is only one "time" that ever exists, now, the present.

For time travel to exist, two nows would need to exist simultaneously. There would be your now and then a past or future now available to travel to.

And here is the rub, if any now in the past or future is available or open to travel to, then all nows exists at the same now. Meaning time does not truly exist, because everything is indeed happening at once. And if everything is happening at once, there is only one now, one present moment and no time.

So if you did figure out how to time travel you would find yourself right where you are, right now. And it would probably cost you a lot of time and energy to get there.