We asked Gemini to break down the multiverse—from quantum “many-worlds” to cosmic bubbles—and why proof still remains out of reach

Whether there is an alternate universe depends on who you ask: a science fiction fan, a philosopher, or a physicist. While we haven't found a "portal" yet, several major scientific theories suggest that our universe is likely not the only one.

As of 2026, here is the breakdown of the leading theories on the "Multiverse."

Many-worlds interpretation

(Quantum Mechanics)