(NewsNation) — Theoretical physicist Dr. Michio Kaku supports the concept of parallel universes, but he says people shouldn’t get their hopes up about meeting their doppelganger in another dimension, like Marvel superheroes sometimes do.

“The amount of energy, the amount of sophistication to go between universes, is far beyond anything we can muster,” said Kaku, who joined “NewsNation Prime” to discuss science and spirituality in the wake of Pope Francis’ death. “Marvel Comics got it partially right that, yes, we believe there are parallel universes. But going between them is for the comic books.”

Kaku works in the field of “String Theory,” which, simply put, suggests reality is comprised of vibrating strings instead of point-like particles. It includes the idea that there are more dimensions than humans can perceive, although maybe not an infinite number.

‘Do we believe in parallel universes? Yes’: Dr. Michio Kaku

Sound familiar? The concept of multiple realities has been a consistent theme in the Marvel cinematic universe, with characters like Spider-Man and Doctor Strange meeting their variants from other universes.

“Do we believe in parallel universes? Yes,” Kaku said. “That’s called quantum mechanics. That is the foundation of modern society, in fact. But can we go between parallel universes? Well, that’s the $64,000 question.”

In theory, he said, there could be “copies” of people acting independently of one another in different universes. Kaku sees a bright side to this.

“Just because you’ve messed up in this universe, that doesn’t mean you’ve messed up in all the other universes that you can visit,” he said.