Do you believe that other Earth-like planets exist in our time and space, but in another dimension that we cannot yet access?

The TV series SLIDERS postulated the scientific theory/speculation that there may be thousands of “other Earths” physically/geographically/topographically identical to our own, but existing in another dimensional plane, and that a device might be created to allow a person or group of people to intentionally travel among these various Earth-like worlds, to explore and learn about them, and to see if the inhabitants have encountered problems similar to our own, and how they might have dealt with (and perhaps solved) them.

So, do you think the ability to SLIDE, might be a part of the future of the human race on Earth?